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 0xedeefd9898de9dbe83e9a69d467900a8295491df54e6c64b9344cb78fa3d0a04. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8299f12e-e59a-4e88-9187-05f15089b0c4.json and https://artists.proofprofile.net/proofs/artist/8299f12e-e59a-4e88-9187-05f15089b0c4.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 0xce438dfd5ee167a5125b68930f6f7b12c72d67b0d35e8d8c2ade02618ef3f6c3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFW2429582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa476391d11b1b3de6ac517b28319845eefc696a656dbe51415d9b3de42bdc2a. 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/QZWFW2429584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40ec9aec05426d4ebf939a546ca3683fee249d64771f7c559903c6c3f1decef. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFW2429585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ec34ae533b44c3c07338e5d86cc815c387238abe96c58757b6d0f3c5b287ad. 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/QZWFW2429586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658c11f655c340ada86bdca01f228ebf43c7a3590b33ee13c5ed6ee58ace5d06. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZWFW2429587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c09c0c7c244168c1775c99ad06ed652b1e30b553fe9a35fb16fb076504a36bc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFW2429588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0c64ffaf839b6155d940cf0852e68cbb930edc0c0fd38e0fd18c8e62e1ff89. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFW2429589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab22179dd56f1628e71b78ce1ad70f27fe664916beb1fc51f993f0de45c566d7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFW2429590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf707ed9e2bcd2ff908b72612a1662043d5059f125d00933b86d367dd12c95419. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFW2429591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299fc97830889185b7297cf50e58be55837e4be10cd0cd1b28e97d206209a402. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFW2429592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9713e559df6e06d8e71040a7789f5006bbdfe487f980de060a2e30adf40d4f. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZWFW2429593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed5e7919e329d98afe00ce20aa2bbd86c6f186cde7b90493e437492de2fcc84. 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/QZWFW2429594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1251339e93d0f99301d2caae05447be00acf4c525dd4e7b5fb3edeef58b2386d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFW2429595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ed32b3a3338cbf4dba3c44f9163d4a9023abc1f666c60acca6b2f82a2bb02. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFW2429596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab3fa88c442b9b04c4eb0e1d83f642126b10c7017e4268e6c7ab08b991ed638. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWFW2429597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea059b0aae1bb1ca0e3fddad461b0bf7d464dddd82dd39a0e41423f081fccb. 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/QZWFW2429598.