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 0xa6509710f55f70662301aa20f3b3243a59bf6bb546d24107936cd6ee8d89b88a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0d21704-e36a-4038-88d0-d15057bfd960.json and https://artists.proofprofile.net/proofs/artist/e0d21704-e36a-4038-88d0-d15057bfd960.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 0x8ce4ca5fba211b87da397b5512ed867dcd939d22cd8d7ebb918522b0bad3e208. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7M2526038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3d42952378295fc32714a4f5de5955bef62038cce3ffc5dcb78b78094ea692. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:35Z), 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/QZZ7M2526039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce0eae0763e570d5a754aba14a351114b0a3e434228549998bd94dc3754dd2a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:34:10Z), 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/QZZ7M2526040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d970e4c7cb75d98cd2809141fa4cc75a9fa445ea9f4ce0b2c76a0b25c698ef0. 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/QZZ7M2526041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f3b824f13308229a0d66d4f3e8e5eb2b959dfbfc7c12b649540553fa34f270. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7M2526042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53667b810b9b0c8ee081b57b04b5fcd615e356506acb92bcedd1218f83c09e86. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7M2526043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d57f45bff8a102f9d2f56057f734a92795444aeb5b73f0c0131b6cf2db6fed0. 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/QZZ7M2526044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05988060aa2520b7146a80edcff275e697fbc6629400191cb70304f31843c19. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7M2526045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc7ce87ae01a6023735c5a47595691e22b0474ffc9f57eb0aaa9d58ed962cc6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7M2526046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02591e6d1b80ca0aab5784912e22f0c9a63c94beeef11b52d237041c36a26534. 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/QZZ7M2526047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962d45fda3c6c57a5be4e7843dde615da9903f40b91a17e8bc35dd0e155939d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ7V2593839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b7ab09478ea273ea40c207680f9647e04fc210970866f4cfbace3fe286e51f. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:04Z), 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/QZZ7V2593842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc66a5d1f80bede6ac738f8506f3b0739a0fb8178605588cb45a711c46ef45. 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/QZZ7V2593843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c166c2b571dfbc6ddcf52072a38970c9f345e5cd600226e8ee6fb556067ce4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7V2593844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f63bddca61baef5663e7e88b36a65d35b3bbf8012dc376f4014894311627311. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:34:43Z), 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/QZZ7V2593845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7e0a3d7fc87a12f1992ce8e3c2963e45e505c4b1b154d8bdc50627efb15a9f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7V2593846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9853f3483aaed2b4b7217a1cdfa5d937c2ce7e02ddd970ff3250e6bc1c096f21. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QT3F62524126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabfdb977c481967b59788c5ee4cfc72ff7dd88930a24dca53e87cb1ffe6b8e2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:54Z), 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/QT3FE2581874.