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 0x8c5afa925c7ceb1e2fb88c9dc72dee2154ed6b51cef9d5876a9f195fc6eb9d86. 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/8b8956b8-efdb-46cf-8506-bcbcfba594bb.json and https://artists.proofprofile.net/proofs/artist/8b8956b8-efdb-46cf-8506-bcbcfba594bb.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 0xce9bc61976cae5ea568a550f8208ddbfe734a2cee67d2cee8c2f49bd283f52b0. 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/BCM9B2301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b5b0cfeb211db2e08c0365177043e5f5b752cf983a003a219211d470fc4a69. 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/BCM9B2301064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d14791865e19db49347f36c566259d748d868451a72bfef2c3e090bc8981d7. 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/BCM9B2301066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f78afaea9604937a7dc02140e6c830a5ba71f0730765206f5ff3407ab5673ac. 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/BCM9B2301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cc2dc28a94ab3beae094f20403e9dd68f66873608aae5e625bf344ab66f900. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCM9B2301068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dac18b1e39bc68b4198ca62d1018d5b905ad295ce89b4a27ea3050b0ef97d7. 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/BCM9B2301069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf092c8311fa61a3da952f82a0f7dc04f23fa5682a117a1e626d6ed000f7ee6e. 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/BCM9B2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5bc6d22221f1e8e638957f258a9e91da4fea46f4c5c20d0ee9ee073f18251. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BCM9B2301065.
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 0x403085687a0d3612fe479eacce4513e6084f20b7beef26d4f5276b500cf2babc. 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/BCM9B2400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c6917d32b15b79bef9569b9f3bb26b7161ded309fde0d63586a3adac093ae. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:02:53Z), 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/BCM9B2400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae2149bfb07bede11e62b37bb97b9536701193d8e55d85b09e14d3b352ae97c. 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/BCM9B2401511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce3fc154dca4bd3e983a045f900f509199a6bf84df7d099dc3ef96c1c25f15f. 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/BCM9B2500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8700f65ee5a9ffc5233554afe389d9a2a5d3eab10e41a262d899763b9fdeef3f. 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/BCM9B2500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95bedaa52d7337a47303c45dd27d14a12e0a3e1f98ef8f9a6682ad81f99cce6. 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/BCM9B2500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa55fea3cb733a40948c0cfd277a0c82a9da4b8a569e0f68e7dcffbfdc6eca4. 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/BCM9B2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e5b40e1698650da6b06ea8c00bb26b18a016d04b48b02a3e315e408a72658e. 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/BCM9B2402273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1907afb35d2ee3248ccdfb540d2d23120e8388ce85bd8c279e325de8a92a0c. 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/BCM9B2402272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1621cfd81f4c8419e096ae2ddcc6df6ce712b63e01c19d4b62e7e0cc4cf928ff. 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/BCM9B2402112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca08f25a1cebd07f3c76e3ff1eab10f5249ae987f2d859df9090856722fe9d2b. 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/BCM9B2402327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22ed23ade1aca95bbe96dc562b2cdebabbf0ae476f47f996987d2c0cc67e694. 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/BCM9B2402252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1246afd16f0b4d246f9a3c8104549a49b7b4b77afad13a9e806cbe7140a3af9. 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/BCM9B2402188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e0e0dfce36f00fa706159b8ad0fd1bf698b36c1be8e43a19b3ec4c1a6bc18a. 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/BCM9B2402174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56887ddfdafe7293298b1f0bd968d69ac84fdbe27b6f58db4d87c0693e7a366. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BCM9B2402067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188da25b09d511328d9856f464e8d9d864b5c8d279d1a652109b000ae4d7e8e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCM9B2401973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1662f39c04e6041f86c750851b6d460fdc977c6f034647c74582df1a7011a3c. 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/BCM9B2401823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f462a9b422fadfc4b880bd57ef063690aa329e18c22e74a79dedbc5e8e45b0a. 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/BCM9B2402113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd692063c2e1896f38a2ec2b0d88719ccdb636a10b19ac497d73bbb66930c6527. 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/BCM9B2402073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498e3f2f426b07a5722aecfc1a1674a96fa949ff8140a714faf54ab11ba3139d. 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/BCM9B2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0566ed9a113179c9eb315dbde4865ed2ac5b1cee1a12b65cc4d62d748c7d2. 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/BCM9B2401796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0775936ee39984edcdba8ff0d0caac2070bffefe2e4ced9272664dba880c6002. 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/BCM9B2402017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe927327675941919d35a7fad1cfb05ad9a8d81541aef588a3d5e0778d51512f6. 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/BCM9B2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba4e1d169b3fcd4ea491fe37d239190902df588321815d59f6dc845e6ea67a. 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/BCM9B2401974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db62d62c3a730c4bb94ed78c5951b61b31119d43bfcbb4d10aeeb117a6eee07. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/BCM9B2401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18238a10777ee6814032cf1d95ce641a74e0355c1d864bbb96c896895029843e. 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/QZTRX2581717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e84564bf00f5d41b4ba6ac175c8649df18784a0327ad67683f5c5cb828702b. 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/BCM9B2300767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4b20de18f87838907127f993e916569595fea3451fa980e2536cea9a21a37. 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/BCM9B2301222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe383598293da04bf90aad7f4b936573e0aec9807fd73a681c5a288a1b375010c. 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/BCM9B2400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421f216ccc8b69ec62ed8b4a0749c6024ec7d8fa464fda6f8ed7e575c3637a3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BCM9B2400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57f12d1f9f0952dc7fc2519d42389f6486e5f71c413e9f48f95776456893c4b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCM9B2400163.