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 0x86e5e50082551a015969db2228961c0a063c241ded4f5d62e65da8b665197e4c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dca5d43a-5be2-42fc-947f-b2245267d09c.json and https://artists.proofprofile.net/proofs/artist/dca5d43a-5be2-42fc-947f-b2245267d09c.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 0xdf5b793f028a58541f7823b9dbd6026f845bc67759ed53f299a30ba1fdd00a0a. 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/NOE1I1401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9171f2ab91f6cf8c8b109d6c8c811c39817b5454aaed2e0968daca638a2ce825. 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/NOE1I1401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e0550ef288ce50f53ddfef9ebfe795313aad73bfc69c1b4551b0289c173f00. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOE1I1401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5843b85cf00d3fbd5996757b669a92e377e419eeb68ab31e8f1dab5a98a925. 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/NOE1I1401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4beea78f07d314262a28e79211fa2007bed2ce4328fbfcfda70e5c7b0db57c3. 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/NOE1I1401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13757cbfb531acf0bbd0f50f9b2e135d7b35feedae2c29946c00632e1f013f1. 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/NOE1I1401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01ca80e174732e5da231853e05fe9f063a47d2b6af0df2268fd51bcf58b33e4. 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/NOE1I1401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e27ffec4aa6781c4def6193e2fff5fd9c651518844f2df1b4476060641246. 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/NOE1I1401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215f3535ccb46f7e0f0f5187b635c4c9785ae2b5efe61683b5369305e7839808. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:39Z), 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/NOE1I1401150.
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 0xbecb711286bd584c1870a5b65c4b85562ead53be7b5b8a4ed05b5f6c87fed1a5. 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/NOE1I1401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2a9700d0fd6f68f7684751947a60a0d2c6dfe86fe0195943d5b268156f20c3. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/NOE1I1401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5553006b54f498861ad5e24272a75f1fa368f3f5206bfbde4756d857246d7ab7. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NOE1I1401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c55592d08e6be8303d0f76d31083a2c2c1f516a346137ec09c25c27d814698. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NOE1I1401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326ad2042a9341524d244f0ed217b24895b6d36b1f8b27b4c9fdf51f514bd4ba. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NOE1I1401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20abbc285be6aea5299b1bbdb6f74e3fa476f0d15c0bef674bb73134144154c. 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/NOHLM1101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf226a168b8eea895248ae63aa1269d8316e4f0df6f47bd1ccc7ea43aa37c175f. 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/NOHLM1101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8080139240498b665cc8a45f53714099fdfc1906fe64bc017f210003b360562. 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/NOHLM1101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cb8d03ec93b8b10dd2bf00124e5eb395c7d54fd29a4dcb25d1b636116104a6. 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/NOHLM1101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5320866038f2f52e5a6792c96b2c4f4b63a483e278b647cf7b5e559bc6d17a5d. 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/NOHLM1101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b64e4a68e3de304a6f1fb7363fcdaf2e7a7c234fcd57c625d476eb1883908d. 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/NOHLM1101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d02d79c649b983f2f3f3ee2802b53a5c1751d60446bda74d9916e6b9b678c5. 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/NOHLM1101150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5fde1e45dc016869bf09c2cd970ec41a5aaeba0f318d96d508c710d0afb50b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NOHLM1101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a8b0d952291ef79e51ed92f91135af1eee26889a6adef3d565a797a76e2cfd. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NOHLM1101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b51dff297854d962dcd27e75efbe1c5432c9936e0ae21a44eebc175af1b1cc. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NOHLM1101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5832d8b68acaaa13db3cc6e9c6c0c8a5608de854c7ece5f44a0cd6c695b6b9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NOHLM1101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3bfb8af3f25a3123a54a77ec0f1fea54ab12223c12e002ed529b7418845b2c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NOHLM1101140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be474950ce6f61f798c18f889ce4a87a56714fe8e463d4fb1e898fa70eed37. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NOHLM1201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a62c6e215266d8175c4ab207f39785dc539cef967c82b3bc00a70d168f9d1b. 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/NOE1I1503070.
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