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 0x36337fc1b59c14cd00a40e2add24a36049823f7ae06e50a22fdb228cbd4feb1e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef2476b7-6c33-4bf7-9fa4-002bcba5c601.json and https://artists.proofprofile.net/proofs/artist/ef2476b7-6c33-4bf7-9fa4-002bcba5c601.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 0x4b6e9b6b2b6e9072d962f88928c68c2d65f506ac1b6f4cba0fb1760236ac8401. 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/ES36B1515136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8b6b84ad733b163077fc332b57531e4fcc39e40c99457366007da6e2774ad9. 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/ES5701600563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6631dbf2586db15144d1871df5aaa230c9aa54ed2217c7be7fad37d526ab423. 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/ES5701600564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6a9216f1712b8c4440e2102364ddd4016a42ec2bfc4410ad1502da041e75f. 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/ES5701600565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875f4e77ac30db7f899c8bbffe5c6a484ea2f8534d56ae2b44e44436632716c9. 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/ES5701600566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa650def3e42960f1e9ef40682fc35273f1c333b517cb48f1ffe4ad2abc06fb43. 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/ES5701600567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d1b52e76fda7c0e2dad9495d3eb199aa1509f47daa3bffed215bf0e665d5b9. 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/ES5701600572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5db846c20d8989598a76285996cf8e3ab4d240dc77328dbf524d7e39254a17e. 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/ES5701600568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9362249f795b795b731988da560c95b8a808e4aade839a98c0ef655a71a68ca3. 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/ES5701600569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e2f53423ce254d8a48f4071e74d0e81b53e2d25e58bd6c1b27d99bdefb2d6. 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/ES5701600570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af2489947b954840f814e6813facfd157b30304ea44c3c8d705c227fd2a616. 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/ES5701600571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552e498057519a2189f0e1ee3eba6a74fe1989554bbdcb55be9ae8bc15cdbfd2. 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/ES5701600574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f98967c23eb96fdfc2dde109e332a49c15924f427f073d53bf751f58630c15. 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/ES5701600575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d263bef7366c465d0ffebcad8497056f2d62e31bc87f6f49a7eba1d54ed68. 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/ES5701600573.