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 0xbcd2394e3d57f9bfea7e7ee0424906e7fa2d866e41500b8acc2595469410b007. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32b217aa-264e-4ceb-b192-ea52f1c81d4f.json and https://artists.proofprofile.net/proofs/artist/32b217aa-264e-4ceb-b192-ea52f1c81d4f.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 0xdc07946123058797078ea4cded46c0a84f216151cb21010d45fb8fe403d0b83e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJM2544330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84fbf09f060fb5518909a4a8dce919100dd98e069163b232bbdd8c8d106de86. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJM2544343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec36a31ec1a1d79c8a705982060d731ade39ee2b3d470e4fde9f6f51c0f71ac. 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/TCAJN2544351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4a5c942705b5b21d88b11147de7344fad46a20833d1752f47e5dd7780add8. 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/TCAJS2581785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e6b0dd67ee3a661eb0abeb3c471e0117fd3abf82d1813755fc848acb71a68d. 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/TCAJR2581797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83945955d54acf2de88b9f57f1e5b1391124998b83eaada2b6ed0306aaac3766. 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/TCAJR2581803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89524835ab4849a5b235f1dec10fd35951ba54513a26ff3ca8317b74fbd2765f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:10Z), 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/TCAJS2581807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccac7a8ac70e936b3a3187635b6bef18099c153b225b94cd22fba1660897640. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAJR2581814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f8155871a2962164f76c92d77daef4fab4b170e7bd0737088b6b88d311d47. 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/TCAJR2581669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa25e4844fde97de5245329cbd25aba8f73e47d81c3023cedc6aed82bf0d5501. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJS2581672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cde166f120564d4db5dbc6678af0271ef64b66f1268af4962c3bd8fd197da27. 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/TCAJR2581676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ece552d37af8e5016730b0c97b61b0c4c330376a60ac3f8560aff898dafc615. 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/TCAJR2581680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16037d0d9d4b330da70d9e3b54bf08e4082c1867b005926d5219a4044ccfaac7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJR2581684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2b1f114fb7003f5babda597071c6bb1c63d11f19a2157819dada07cc7a7669. 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/TCAJR2581687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1e72595edca1c875a4a9235492e3a786d137d5f11ee27619e22b7e684fb353. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJR2581690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda412150f1edd93a790ebf599ff4f33a7f3499910013ce6f44588c7f1e52843b. 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/TCAJR2581694.