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 0x17a47693c7bc4587d4c83665151af3eae06cc10270d9058fe4f6a0ad7226b2eb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba53dbad-529d-48e9-81ad-43b953c48777.json and https://artists.proofprofile.net/proofs/artist/ba53dbad-529d-48e9-81ad-43b953c48777.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 0xd41d8d0b536f384a30a6b67634bdc1fe30d0d2b13ca1643462fe9dd623cb2841. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/USZAT1150778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7851407ad66d5c97e613381c023f68cdbdc4f00eb793f18f094059d8befacd06. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMLWJ1310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b1bb955a8a6e7c63fb381ff612f91a718420a1c391ccccf3f274dadb6434d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMLWJ1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98308a968cbda2002a4a4622f8381150eb675a5e46ce67b51e0b356da464f634. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMLWJ1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b37a0ee86781eb54653802be0d6b232b7345931ff1412d816d651e53628b810. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMLWJ1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1fef6d99ca042717e68f1e08aebf36635ceb981cfdb8bd8ecb3f3e35154761. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:09Z), 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/QMLWJ1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1288ea3c7d558fc17c07af3369e08b89470376d7175fe9fd5d9c46c641711. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QM9A91644309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0892438d3008ed08c48ae6a1d289cac87b17ddebfed9cab86972e9171a57dd7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:34:45Z), 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/QM9A91644310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4c0d2984f503faf2247476515571b1520a1206395936456b9dd3a030601753. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMEU31800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898bf2135793973cf04a8f132d4d37ad3f2323682ccef5bb1871f72b72cd52d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMEU31800424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8805de210c702e3698ba31786d5508d865596c3cddcc005366cf928fb4c776f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMEU31800426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426f1cf7ece0f7e1037599192c7b6be24c19b9e6ae7601a359a411c50a900109. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM9AA1894952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f5f0703682e8c8275ea5875f788fd1478aeaa92ae25083f12dabe8a5eb06da. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM9AA2082402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295f76103629a91db5774f09cc809b5dad224621cc29eca57739a62b8b9bc264. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4R2476860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951cf68a78fe7bd7ce2d4035533c6eb16a19921ff01e922390c47c91fbe9dc6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:33Z), 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/USL4R2476862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7e10b82f235be01def83cb8677ff0d0e62b9887984d52905106bfdecf8b4c9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:26Z), 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/USL4R2476863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951cf68a78fe7bd7ce2d4035533c6eb16a19921ff01e922390c47c91fbe9dc6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:09Z), 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/USL4R2476862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7e10b82f235be01def83cb8677ff0d0e62b9887984d52905106bfdecf8b4c9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:51:33Z), 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/USL4R2476863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d78f9b8aff4c429ced1e37b0e15e36617063d8fa8bac568f25e9825b91771. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4R2476864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b010f31c276940890719199ca627c4dfab4a2aadcfbcc3dacfd88ac383f45. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:38Z), 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/USL4R2476867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e13886b23606b646058d87ca39d77cf59fac2adf290318537d64ec8b35130. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USL4R2476870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0101d0882bd95fbdac1490760543f73c0df5bf7a1e37f58dd4c8abcc987baa61. 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/USZAT1672418.