1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde4c27c138507917117d337cd21de1e2ecca1071246d005b2f824d2f8747408. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfa820ab-1c4f-4e54-8c0e-2ea790cb156a.json and https://artists.proofprofile.net/proofs/artist/cfa820ab-1c4f-4e54-8c0e-2ea790cb156a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22fe8031e898d6c6e224281f19c730738079626e9248e1b59019428cb787a4c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUMEV2419297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7566dc82d16fe66ce5f78edecbb80c2021e778c89b0e70ae392466519e7026a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2211147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635e2f966ed448a7f990796ef144a7c947e41d0b2f08b9e9a1ead15274a4cae8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2206124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca714a97582391080e95fd8eed5cbb05b678f3019c000bd96a760d1670939e1. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2211145.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cbe905a57fa64d31881ba4c085c94df339a57d4ddf54fd6e13a0e1f45a9fb5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2206122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b1055adb736d25bae3fa2acdabc1b66c1f5c61a7aee5ebc8b5243b9a0d57ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9ebb11f513640313578277d188169222bf89cb0dfd7156ec26a4c2c07ea7de. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3fc943c0a2ac09dfb08e7f1fa27ab261718d1d441c0d0788e887f2200a438a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308b63a23170308911f58e4197e5b2abdc3620a37c70ea8914e3be9ebedc2a9a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e10943e10e4bff050bbd50ebe6d24f47831cdd32e8c008effdc5a3328f8eb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b65218d91ffeb49ceadac971391d02a96c5badbe0da56ada6e5fb1d0269bff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c474fe7c8cb0171c7a58ea36d0aa1693ba179f998f4417101847b7e30da7782. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735ca8fac3ba3bf5c5ce15f3bde8562edc76d1936f74a550ef48fddfe8f3f72. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d9501ab8af0926d377cb410c4ddf2eeef5609f482fee9fb1570782457fdfc0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5854de6265db33617b7d4b59fff6be4c2334273c9ca138ffe539d480297e2b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f8ddbf3ef54e3a0ec690d03826e4661925e69a36cd33f7442bbda779985f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCD4N2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251eb86084bc3ddc23f68831ca070787c37a215a36a64036ea95ab679305929f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1587146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df4b489fb374e553bde4de3223ff7dc1bd6cba295409a2d4f7572e5ee44e632. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1587148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704ba0e1835ffb1b26c7b4691a1d9e67bf9d2e85e69cc30569e8f071c41cc68b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2408445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e756634350fbb8c068ce8d45ac02bf5a9ca303a3e9bad314728f07521159ac6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2421232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf39304d3eafc14c8e0b82551a7588df2559bb7bd658cbadff34bececa72f368. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2408422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beed7c1c71df45df7cb3997f40fd9f49e5e78af602274f34bfacd5dff0d1791. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2405538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045877539d132db7ce644a347689da6c7b70c8fd323ac747954a4bf6da95a1a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2416175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36545e7944e071be342dd296a145c780ff9f27a3c7fafc0c4883ba1e0b3fc773. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2482253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8612e9e7a24e623dff2735153708ad1dc85954819e28b4e151912309e63bf8e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2468986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c4f5c97d0f5678c9b06bb39d12e6a935ebada502c6a5700421a84f8e5e31c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2460980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12265fcf850f56b4873a673a1421c49e542a3c6feb85fbf547f15ccca0f1fcc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2449146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d18dc5c5ac495b3467ca05138aa8aea9a59492eb6a942a2746c1f504a55ead6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLX9G2400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd81f22c78f0ef919f8157da5c8ef2cfaa2a3e6448b91011174a4ec9b893d0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62439050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9b39b48b3b3dae9967739c3a6005f400668a674d50ceab94d1f366faefc4d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2288653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986062fd9f5fcfd17f50fad402715f008ffefde1d0bf8615b5ca48bc770bf578. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2279853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c1cc5e7f32a7d6715cc2efae8c7b7db3dc45ddd79d0b20284a09fde32ce2fe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2279857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd80215b5f328bd7267d5e1ea734b626fd53c3762bd58504f2bf0eabaedc3d89. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2279854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9ce60f87c5c068479437b8d7347915f47e709ad378265b7314846b9f35c448. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2249202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3633a24201f270d396697579b586f3607a1ebd209d2ecd52190e65bfc77e9a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2213064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953f181bd1329182db28aae4a030f1ac3909f932b4b465bb1370a2330dbcbb0c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022371812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb779dd4b13a173c808d1afe9e913eb2bf04e08605ea1952f9fb6792afcbef45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1559364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6260c00d1892c025e7915cfac9858b8d9ed6e5e8b6133ba28d50097ae15004. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1559363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a4cc64b1c073d3a2e57c1f83a13f93561ebea4eebd63f53858d7a30673f45f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY2358860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f43868b4fd9bf2cc4a97fe602c25790341040439847ea660d6dad7daeb6d87. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62127948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51909f4832f4ef918976620994d2777955a447b2506035af3c0757c9cd83a377. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2184031.