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 0x46289dc6ceb4ae450ed8253f3b77645e33f4052d42ef5514ad16cc2402a7998e. 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/0ce77bdb-5da2-40b1-9447-5e36bf4f716c.json and https://artists.proofprofile.net/proofs/artist/0ce77bdb-5da2-40b1-9447-5e36bf4f716c.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 0x116cea9021c2a24fb5571cb14651f4d62923cd852872675d11cfd47b046e008e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ESA012162730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ed82eb5b4e39122311af2e4543491544267eede87ae6f197c54fb3838707e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012278745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7448508cfaa3472d21ef9780cec2655efd35ce7575e949809701575f63cfab1f. 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/ESA012278773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27068831a16469629e79eade6371878599253390d9102db12965d8b4bb25d8bd. 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/ESA012278775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc80e28423e206b05217aeb17b4dfde8013a4444becaf3c197a9961e5dc93ed. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ESA012278782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11880b94ab289a51b774d15d231375e2600793026e669ab4780ace0fe4fe173c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA012181986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7707f9dd0cb2ac30b372cab71ba4e24652b98454983fbe7443825ae40dc110. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:23:57Z), 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/ESA012181987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887189df2f4fad248faf5db70d584d18c97b4748f23fbd85d186c3370b27641a. 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/ESA012193187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e24c5ecfd21a8d32cf288b27c1440c19c40f9f6c0a41697a4d02714c1b555. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ESA012193189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bfaf2fc99c7fd8c8fbc40da6e13a5f0d80db30a3ef19606f5e2170e67f7b42. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ESA012193190.