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 0x3e2fa4c636e0a2c77413247d65ee2db276504abaa8f5dc1dfcec76a12417776f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25eeeb0b-b921-419a-838c-c69f62784d45.json and https://artists.proofprofile.net/proofs/artist/25eeeb0b-b921-419a-838c-c69f62784d45.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 0x32a649fc474765c85fcaa35ff4a81858e72dfd2a1c2ea96c2d551269dd54ef0a. 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/CH1081600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81f9cfbddeb215764a17d94b2fc194003bf1f417fe4f3f4f37862dc43817a33. 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/CH6541902798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120fb9d4c4afd07fc176d725a8b9145e5684001a64d359b052dae79ba0445ae8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH0049500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2b087595a35b363949d4c82a7d4f5d333acdfd09c6b3ccb667a274fc02824e. 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/CH0049500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494fd74db8ab8497c77d91e3f4f8b81124d09b1fc70ef861386e7c32962c23ea. 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/CH0049500560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca395e4272c7f98fc1ccabc085c543d523ff5c26c8d1817ff51a9e24231aa4c9. 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/CH0049500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6a053656b260c8220c18c4ac0064cf49d3fb5eb0e93b6895c1f3c244daa132. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CH0049500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36f6bf0bc1fb94585beba1a80d194b4f2c225577e5d1ecce26f0cf76ab74cc4. 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/CH0049500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9f8567c5d8ec7c49d3db6761a9a5c352f774a19e59cbc121b3e6ae6a1e579e. 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/CH0049500600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7880c48e3abacba72247be88afc890f5a46408bcd269cb65177ecc0065311c6d. 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/CH0049500610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643d84e76338fc43dee782ebaf63e2b0e6c9698a4934a6b8090bb88ff670ac89. 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/CH0049500620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5da3a276b2739fcb7ab515c1f75b12344ef4948e95b80fe40d0e1f414562f06. 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/CH0049500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a24724d111cc4a9285d266399edbaa63480a5bbfa9808b9096cbfd423cb218. 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/CH0049500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc02a9f79478a92e6018d78f7b1631fc6d16a8256f317042ad4f6d4ae46eac. 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/CH0049500650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59af9661aed494b19c3b507b7886db410c5124dd1d017901fb00b5ab797e8f6. 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/CH0049500660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a64b695ec9f9b0ece97415423589cd2f3e55ff850f7af3ea9161d78e6a945b. 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/CH0049500670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dfe6b73248eda0ecaa9a46a8ec8aa38842ffc06cd5591870abc410b6692356. 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/CH0049500680.