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 0xd9bafb165104c29e6ad6b5957ddb4b15206a52f0263f3343ef2973060d4082ae. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a57a1db2-75a5-4ce7-9dfd-ca9550ede66e.json and https://artists.proofprofile.net/proofs/artist/a57a1db2-75a5-4ce7-9dfd-ca9550ede66e.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 0x2043bb7b89ba566f560fa2b496be12055ff6e0a61de166e21cb7a1f2e252e993. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IT1M92300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74166c2b257abce27cee25a229d2b797910a2726945bd48b86c5982bff3e60d0. 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/IT1M92300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd73ae8522ff70d5c7e7f9bfabd8d31a2bb6d8039a7fe78684934779406f33. 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/IT1M92300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982037e326fca8ee6744b16b590a1b27084b1bc61d1f8c6c8c3aa61c6ff6efdf. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IT1M92300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76fa160107035dceec3f579016d10adb8bb61f1c95bfba74e449a34bbe1ef77. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IT1M92300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3bf261554f175a93181bf2be53b19aa1928c7a6a6a0668526f571f29a384d1. 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/IT1M92400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb42b3ad1b47cd61fe66cda8015ed194d4f6f97136cca68b776575636d773d4. 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/IT1M92400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adf3195c8a20c9eb46661eea2b102da5b0c3476e6c93bc632c17069557e40b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IT1M92400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb757195ddecf900f85570710c56454077383d439eaa8df459d062070581bd0e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/IT1M92400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c34321bfeb334013f0a6b105867e7fd26861a2c9f3d7084cec558e736657558. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/IT1M92400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbd53ee4cf6bfde82951dbf69de846d5a55ed99e6ed835a4ffa6e4ba1b53695. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IT1M92400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa8146d519941de8b721e8d68e4b94fefa98f6e7932449fa8ce79857d638806. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IT1M92400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad993e223fda7fe386fa83a3db0d19d9844488166b1e821d8ad3a27cf3e611f6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/IT1M92400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da2b10d07f79160cd283c54938f8e4bbea045405490e36ca3bebdedb90a9ea6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IT1M92500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5824e166857fa3ae6126d953aaa9ca0231a11c2be4f70556db34a7d7201187. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IT1M92500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc601b804a503034d08cd98c71b2e0408f47d465b6a8c9a2b382ed22bab0a5c73. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IT1M92500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd171355f5207136d23ed61f83fcc22f71a76d606181071e87f23c1c44482302. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/IT1M92500132.