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 0x594e4bd4dd6d2d93cfd008a03fa667b56007e74e4f8972ec7341652f383f23ee. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c62832e-0683-438a-beae-9fd5e7eac86f.json and https://artists.proofprofile.net/proofs/artist/9c62832e-0683-438a-beae-9fd5e7eac86f.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 0xf12795955c4f114ce4467472d52f4203440290f91559cb6312991e0d3e33500f. 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/NLL151402158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779ba7001e43e7744c66e3499125c88a5673ef528701dc1df7078d6c85405efa. 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/NLL151402160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fc6c0e1d4ab91fe49ade89ad136e21c433c97df12371e427d2985362787acd. 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/NLL151402162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad629964192ebde654e142f3db22477969194c43f351febef077062accb7fdf. 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/NLL151402163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791964d010452a6ab940ca31b19eb3340f696eb8628478933452aa86ce055730. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLL151402165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ea43595d346e12a9ac199fa75ac638a9538bfcd76e5b32ee651985d3150369. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/NLL151402167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736933c7c10e7349fb36f494158c52a085dc8bc761f3de8ddf277d13017997ae. 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/NLL151402168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537227666e575114b17015b462bf1b505c57ca83c7b622d5889bbcc78685624b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLL151402161.
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 0x3bea28e0f9b7ed3dc2d34ffa3b65b7641c6b6e05f6181025425c531aac06e7f8. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLL151402159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd180e887c902082e67cdc63991c4e033c13ac151a25f7a7c5e30bda985dce. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLL151402164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac7a9a6bc253553d918bbdb25a46f53a1b48270ff1ef1badca31349075c4890. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NLL151402166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42af1228e9e64c9c5bd37d8d9479c67c1200969462b3bea9e843abc4e3ba3cc4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLL151402169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee5144201d09521aef91774441e3f2febec9a1c85fd419c7e05240432053d90. 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/NLL151301872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe515e155df04c626fc3ee0f271431d3ebb9146a55d678cf11937587f2dc32ae3. 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/NLL151301873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0824fe4ef4e61a606db59c9a968cad3110e1418b11926b18dd5db85874e3ae9. 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/NLL151301874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cbd5326d8ae2c4d45f397e307db2c33a73b6fff9771b3716a8ccad9afe5413. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLL151301876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba79d298665f97b1bbe065abe25a8c4ce9c2869e5d9b96024d99f29c635bf62e. 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/NLL151301877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40691abddc1f173815ea062ebb788f4a4fdcb88f1eb53223e52c01c80f74227. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLL151301869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5173f3c24f5dc6e3e4256d845d44d0b119e6242670b4e7d19ebb9eb49feed297. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLL151301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca8a05a445d3208990853a9a9919a124976c23080767cfc26b63b8948e1a289. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLL151301871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5d2fb96209678cef8affee1c3eccbe611d5661af238b4969c4d57c26b91db. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLL151301875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e16fc7d3ba31cf7c33c97c41df2704895e5f22adbc1e3587b32f292b1237866. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLL151301878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936fb4120c44f8e08d91fd42574cc9e295cae460536f375fb881afb48b9d0ffc. 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/NLL151301879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94974e0a212dd9cfc9837c66e69df76b3210b343b0e54934ad71d075035b9cd9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLL151301880.