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 0x0c9cd8119aa5b30209f93927bc2cde466048125fc053e76dac0ae914ecd07f0b. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/782d7fdd-64f3-496b-a1f8-5b32d6525c11.json and https://artists.proofprofile.net/proofs/artist/782d7fdd-64f3-496b-a1f8-5b32d6525c11.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 0xc38e5639d24372e8be1728bec57092155e4fc8edfdd13943d471ff904f098261. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZDA82364576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed785e068d3836fcfe985dcca51202af0661b0f478711cca77f2b6115b7fa20. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA82311243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425584a4f902ba92713b1d2b395f8e10ec558bcaf0f9d21c01b9d4ebb6bcf414. 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/QZNWT2430390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb56d2d18385a2572a00d233adc2004edc47bdce65406ae20e8f4f846bfde8. 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/QZNWU2472807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac368c81adb61b1c853f357eaeb1d464ba0150888c8eabbc15fd2afb840ccea. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:53:20Z), 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/QZZ7X2481588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf8cfbbc2630d9dbcc843d6003d4b37faada6ba8913b268f9457c68feacb88b. 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/QZK6N2524985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569006f8177e243691be5607059806f6d97798b6ddb151756e7838169a087b27. 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/QZTB82558663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b564d60e2de4b3d91bee3b1ba9e772604b2d814b1c969344f68d68957a8881. 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/QZTB82549271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4852a61d5262f0d8bb4ac813cafbb6587542ac714ff274e8af814fe296e383. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB82552863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca8e8e5fb55446c5ed73dd56b54a71e3e9f3bdf0e8ae25479407b33af60c40. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB82556473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6832b8f4d46aca6597c2e558daf0a4f10a65297b70ffe59212db868368627ece. 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/QZTB82558698.