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 0x057fa6ef6ce027105391c55013d7d233575a5e7c8d6f17dea7ebc7875b8c0cf2. 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/fa73d1d9-9630-4701-b814-ef9c5d74c9ef.json and https://artists.proofprofile.net/proofs/artist/fa73d1d9-9630-4701-b814-ef9c5d74c9ef.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 0xe210b35d5fe340b2a39773d705a6d197ca1bb0d0b1ce4603ca54284273c4161d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:06:49Z), 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/QZK6L2004905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c9fcc3bb2c91f359cd4bb3c634a25be1aa8f30dcde380ebb46aa6a4d86d942. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:49Z), 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/DEQ022260577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9444525335ce347263a74ee6629c4890629f08e3d51e1cb0d505d4e31968d2d6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWX2294870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccf679a6a6feefb1777afca477b75f170c2856e11acb9c6c16b2a0606d590b0. 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/QZES52570283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90239bcb86f7e2bf108aaa431472ea2be1859ad6ec6bdd8182131157037571. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHNC2553915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5491f9fa2cb9100c0d8c9576b60ce95662cf83e6046cf4f0b7f9c88aa74c4c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:56:14Z), 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/QZK6J2566875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc691311191e5a8e9036b2c05d914b92969df7ee70d1997e3966f9b613a63d8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB52556448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96ff35eef850ecf6cc92753c517865e92225a555a2c414a700ba322d8eaac01. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7P2512637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243f302b1d44c799c21533b63e63697079b7297e2991696625bdebebe0e2ab65. 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/QZZ7X2506669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ae09e1b90227f261cb08eff7c4da73396146d5d0200228bcb0a08043a38d2. 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/GBKQU2386830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7154a118a692f635ae41430ded06d1c428f212176c93efaeedf43184a2c5e84. 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/GBKQU2419678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf529be11038d27eb8b7c6d173ac5dfdf740f066c697c8c7388585bb8633a352f. 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/USANG2120631.