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 0xe23182e9fc975c3a8aba3e78f7e231f2ad6373917023233393dfa0700b3382da. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a2d2c0b-f7ef-4c07-8462-0a56d686e1ea.json and https://artists.proofprofile.net/proofs/artist/9a2d2c0b-f7ef-4c07-8462-0a56d686e1ea.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 0x71d96769ca727ea0c2095a429347eaf9bcadab09d7ac606bb21cfba4b25b8c23. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USY242478974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b3b506ab784e68230d270a90de810b7ae174caa7a03c1037e6c1da7b942a76. 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/USY242478975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc096fd07be4aff4e0a7d09d40270fd3a3219ec66a5a668a9f98884fb79d252f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USY242478976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951a98de4980124f155877e24768fecb982960cfccc9f32adfc65ea26354ce7b. 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/USY242478977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327615476c3c7292514c6d92fe66940f5db42627d98a21829f8f08ac17b0250c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USY242478978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d9db27c2e01ea9933a2e0d42517b62585488409b4132158a9238847604d002. 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/USY242478979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b40617e8212888070999f1132bd3d79cd8c1d7358bbdf3196d34e927cd15f8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USY242478980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6b6a2750149dfaaacf8424d5e56038494c31d99a26213bdf4193968743f7be. 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/USY242478981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e9a720ae91304fc0065d16b889bcd46d41731b1ec44fa6383c323c5993af6. 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/USY242478982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb590fba06bef5d0a1a557bb5a0f36aa342645a56b5d792611da0f6277c8be46. 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/USY242478983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665946ae1e124d3b68a2e2837873112f9fa3997b98430019b797fb3ce864ec0c. 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/USY242478984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c52e919086a265721e93305e8eb808b19e0e38b3d67a363dc3f76539a25c5a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USY242478985.