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 0x73d8484b918e1a22cba87d98d55b984d4596c64f246f074ad6cd30346ee158f8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5740be0-0b37-47bd-8d2c-8bacfffc410b.json and https://artists.proofprofile.net/proofs/artist/b5740be0-0b37-47bd-8d2c-8bacfffc410b.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 0xc336bb9a8535d14a49a00e1e2e4e0320d4aa51c0b99c1b0153d7f0634272cff6. 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/TR0330640454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbc49618678c48ee9d2ab95215f93bd9508847e5bff2ba7d947acc927b1a91e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:38Z), 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/TR0330640439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071cbfe14fc2da333676f02d326592b2687481bc6a600015c618341a562b86cf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TR0330640372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a245438bf8c6d7def2a002363939af01d4b3b9625d526c066c8f6b89a8b15. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TR0330640487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88dc3068852f56fc5a43a533d4514cba09f61a3e399f42136d57eaa0ab3fe9a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:23Z), 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/TR0330640407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc5a3dc2de29dfcd2efc561e7e696af05e20d010bb01ed6f81888347fa22ec5. 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/TR0330640476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec2652ea03038d156ed0049b675bdb287c614ce5b3064a642e27f93c3f7c43. 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/TR0330641674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62421aa01f4a9255090a520bba1cf5a5ec500ef33afc2e5262177c4aa51c35f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0330640273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa33c9880381ed98dbc533072573d53ba119fa03a9b848bd217aa62cf9a92d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TR0330640345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5230122b4325298b37a9eab931ad8fc8c6ea9a581351b3d002f9eb58963324. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:45:42Z), 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/TR0330640289.