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 0xe1d8a909d7b6f6c22233bf2f806422b3889e82201bec7cec220a6533cbcc193b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b73f142f-fdc7-47ae-bbd4-d8bfe9111023.json and https://artists.proofprofile.net/proofs/artist/b73f142f-fdc7-47ae-bbd4-d8bfe9111023.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 0x0273668b094aed6d0ce1d87c770eab4a09612e4349ade9e4acf1ecfb3cd275ee. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:26Z), 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/QZ5FN1967555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b1231d412244e5c071ac51b421fad0e2094e1574a02bee8343d1e12278c50. 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/QZDA82001373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9519abbcfc89444125110dd5289d992c0d4585d2d82c6c4d1445e217d5791d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2098370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be00e930372f2a8b54ff896161624ef9e33e95738da29ae71b8fb5bc7de3ea. 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/QM42K2219205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbdc58e6aa0477c17e782564b2168adaa8bfc72d3c066f5564c9c9c0425833b. 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/QZNWS2399345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073399f08c2bd8337897e39c270949ffb34caa438391d420496991a66738c7ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZE6V1810033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abd9e140f93c5df330cdc7a5120ab11f0f19e666b1f63ff1f6fe33f62a5192d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLV5Q2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cbcd90eae2d414b6756d9aa7cf4c48b163456a07db588c18c8e37318d713aa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:02Z), 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/CA5KR2453921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe79aed24207ac36b8ed4989b24e4f2d1baa599e7fceff7f62d26ece23c1b7b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CH6542456298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a1af69294d8aa745620ae14ecb3938e6019ecccfcb9a5017b70073c7c11c1. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZTGW2402223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90c20385c8281f5481887e4486dbf73b7ccdfc4600b44995c9c64f45ccd18bd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTGW2404699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc144cc90301ab3cc8a12cc2bf169158fc067e4679ff1e43499dc3da62f2ac7af. 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/CA5KR2010128.