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 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 0x4a5a4402d72cf60e2ce5d4599afa6f22f19c79f59b46bbcea89840cd69ea8308. 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/d9197455-290b-4527-a0c9-8a2268c6d602.json and https://artists.proofprofile.net/proofs/artist/d9197455-290b-4527-a0c9-8a2268c6d602.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 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 0x9429a339b0aaf1b6d74a1fb19762986ce41d784f1616c8d413b349de46029e2f. 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/NLD322100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffea26971edbb52f1f6964e760eed44736069e590ce3c44b4f9c6e5a7ed3714. 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/NLD322100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7cdaf9f712df28c7b1d5261543ec83ee2f28bffdc880eb8950fcbc3356550. 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/NLD322200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368cf70da50978df59987c096048d72c6db685228a898d3bec2d5207bd4e35c6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLD322200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eeb32e94e02f4e3b46bb5026b10bbe0a8a6fb985ac87f8c39af7c6c8edb3e5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLD322200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e426837b4544cbd685ccc8817e8eb74c051609bc67d2cd1a89bb64be9d647c5. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/NLD322200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32d9f51ae50e2cd026abae70c33e310d59b663a870de39a18439dceaafc8dd3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/NLD322300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32d9f51ae50e2cd026abae70c33e310d59b663a870de39a18439dceaafc8dd3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLD322300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a15aaa4bda02dd7548303d1a376240be3fe89f97e8967d3537dbd1bb98e1d70. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLD322300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4009637b607c66c2fdb92aba7a47de9e57c496e253c18ed9eeba996a5c9d2616. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLD322400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb732f592e680fedea9fefc484b3e9bc5739829ca7624ea130d3f6c8198fbf922. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLD322400039.
It's Never Easy (Leaving Someone Behind)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113fea46e27861ed2fcc6a25effd887e589c9fde96d9f91a6a253fedd947a975. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CAN112500673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5d5fac3eaf962e161950aef5013406cb087b12a37009ea780d7f0a6e817a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAN112500338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e3aac5ca50bc0b0f9d118e74c6ea54ec4bf099793c3c25b2e84710b9d27cb. 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/NL5CY2200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56876d4ddaa497b6f8b0338a1502652e426c128ebfb1aa5939495be03524d5db. 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/DGA0L2321354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf416f6df48bc88dae1f305b0986a89f06488c58e1cb9b49bfe2bff8f4419a37c. 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/DGA0P2463551.