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 0x85ba76791785e357254f0fe83fb3f466e9b4ffe5de7ef01edf6a40252a112bf8. 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/4fdaf20f-468f-4f8f-83e3-539bd081cdd2.json and https://artists.proofprofile.net/proofs/artist/4fdaf20f-468f-4f8f-83e3-539bd081cdd2.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 0x3a1e3993c3c8acdece2bfbdf3a97243f79567852f6c35d09854787cdceabd067. 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/SE5IB2313027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794195e8c8dc934ba85842af521d1e576db116a279ebdfb4e70f7b5f7996641c. 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/SE5IB2327451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39089f7a595cff2cec08a081b640745f3cfa20d2506b0529ae6ee0e80d87cf1. 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/SE5IB2322107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45e1f2d3abc466e4e48765c0a4f178129eddbcd949c505e3b54572608c77d33. 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/SE5IB2312607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d954bc91ba6ddb5124121f23ce8c6a4e021432473fd9e5b93faf3b9d866d4a. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/SE5IB2310199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896d28b1f9eea283f8cb19edc0146e79198abdcb2d7b6b274ad8e76f99d8c0f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5IB2271713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5a27089d3a6b80bafc6734efc84ea8aa0944c6a60ac0d213366000178c39dd. 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/SE5IB2306479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e79ec046a7e16852dc8228970c2026e2124b10f9c832343a9bccf37dffcd37. 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/SE5IB2303176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5878d70f0b2b9a87d6c8275cde8e891d3966a004b76f67416179bfaba08783d3. 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/SE5IB1901343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a91b432f05e70dae61e0cdc34a427f0608c616767bfef62e9e067fc9daf4c5. 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/SE69Z2403208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3067080e694200a6794256aea2d5992f7e96e97b2a9bb854ff27815ad3b2fd1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE69Z2409058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7436c91d20afc0fdb74600232a5a28701763131a5cb99c8545ce31e81abdb06. 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/SE69Z2412426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3067080e694200a6794256aea2d5992f7e96e97b2a9bb854ff27815ad3b2fd1. 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/SE69Z2409058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefab3bc3d76b086af6230f37e18d7a137519f43e710f06ed96e468c3476da87. 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/SE5IB2400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc618d6d7e171ee58bd533b5029644a5119818f7cc4ad9668dba77e1dff183a. 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/SE5IB2343355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8528b2e1ff76937b69fe0e8431a0a6ed0e12d9e4455b803e5557f8127de8b2b9. 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/SE5IB2339019.