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 0xd32e0cfcfde37f3156054f04da4e20e9d2a59296a98f16077652e7108c6ec47b. 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/b4ee65bc-f482-4b4d-ac77-803ccd72da85.json and https://artists.proofprofile.net/proofs/artist/b4ee65bc-f482-4b4d-ac77-803ccd72da85.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 0xf449b57a8f0e5156bd8f23f548412d31824ef298408b344a952c8beffb171c01. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BC4MI2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c8a895632c7e0de5b9600cea575e94911a11303e0a1151167db6a7536e25c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:49:42Z), 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/BC4MI2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6b88cf860075b5a04b27fcb5a37cbdf3afda5cea8db793cdd374d4c1f84842. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9N2251890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a787d6986382d2d756135cd96b13664b6d04a330ba8773c5eb21e13d1d6ed2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKDIV2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a787d6986382d2d756135cd96b13664b6d04a330ba8773c5eb21e13d1d6ed2c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKDIV2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3886b0feaad6eeb63673a383ae89f73b6df32df3a1433fbe3f1220c44d01a353. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:01:25Z), 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/BC4MI2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824293e3346e61e81bc7d06448762bce4366e79643b16e886234497ed9946dee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92520795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e1885d4118b9801334b3a7968b40a1c05accf8b50c7f024f9b9066c8a8d3e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2555985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de44df725af000bbee23d1385646a7baad1f77784e23f43aef74563c40b65a2. 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/QZGLM2555986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb781998df75d97a1cf8d182753b889330c90bf418a7c67825218dc0ff5e8a5cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLM2555987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e0dd3b8a1fdbbda1e8e2f99120d99b83ee48be2c69b465c3159ae24bb49e6a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2555988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97da6463ebdc869855b4a13882361f640dcdf1c4dd449533c1381682b017f9b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGLM2555989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6c9cd2db9f17f5e32c7b3050d9f670c1f8b4e18077705ef631e83b2912d226. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT37S2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23752ea6459a109131f267a909f881ffc13b02ee01b6f7c402686df80856d999. 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/QZS632431760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98bc38da5c11b1dc89a7decac35677ef6b769ec539cecbad34b6cde0c4dc5f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BXKT32400002.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch