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 0x30e28ab01571b3672e77c544e53d3c3b2faf2e7d2ab7d2bccd12bade9a533653. 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/97e3f313-f79e-41bf-8447-4e5e4b655170.json and https://artists.proofprofile.net/proofs/artist/97e3f313-f79e-41bf-8447-4e5e4b655170.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 0xcf1508d9bb7e22d223156765edd9899ac77efb808150223a241b867acd07dd69. 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/NOXPF1505020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb348b7d685dc352a7f15cbeb8a5857206b1b35f090f137a72baf4b47d8e2129a. 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/NOXPF1505030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b490b92cde7b8642997bdbb4db2a722b1897bb280fe5072931468bc26b888aa. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:46Z), 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/NOXPF1803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc81c6a5d420c84347df5d5f2795a3e5300cf87970454444ac34e645551124. 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/NOXPF1803020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56477f54f0ee0a62482525956a50d625ef29c78debee082cf06ccdaa53608cc4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOXPF1803040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4bff985bbc795c507ed8ea71c41262f5a0eb8e01dab877727b32d7cda84ca1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NOXPF1803050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1245001232812c81be5329c96de55ffa5f349e9f914631073490bf9e93340a63. 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/NOXPF2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279265c1d491a3e4d3863034a1cb25dceb99ae19711aef48c1f10bfdcc4a531. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOXPF2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cf746e10b9e35d2c443d627f169c8a3b510c56ecd862b38745f7d546f14428. 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/NOXPF2101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2b7618e358a4b68d7ca2c7db492dc7eb5b392fd1898250dcf1f34d48bb919f. 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/NOXPF2101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b75b3a02d6ac7cf57cb7b8fcb986534e6f22e389d32b290b3a151c5379d9d0c. 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/NOXPF2101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db8e05ccfb7176521ac520c1666058b7e902c44c036e7bd4e7658210ab69bf2. 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/NOXPF2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8671aeb1c66c8e6e28c212223ff7c9db5ef9c4fd137c3d06c23866b880b52682. 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/NOXPF2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffaa485cb8e885db64898a2379e558adaa0466499d782a92ba948487113999d. 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/NOXPF2101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78890b17133d0f3ddc38b3ae2111507546e1b76798309f72245062f975de921a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOXPF2101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759a36425ae0526384d996f3a8fa78693ed481297646b254b744a2ac27432222. 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/NOXPF2101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a5848f1eb015cc4e023c86ac6a5e4926cc25bda04600f26eb5da82361df4d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NOXPF2101120.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6ca8d96bb4096256e45e6ad79bd3fec1c4dcbab51dd959c6af08744a83c9e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NOXPF2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934f77e4e936edb6ff49cad735fc0ab4e66cdfddc1c07b543ab97113db6d92eb. 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/QZK6M2210956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31e465c7b3ccd648bf54b80dc5125c04d83737d533ff0b9d259fccb46d4d5f4. 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/QZK6N2368185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458e44df7647ff1f0efa29cf63246846d6eed94b49eab0aba9f9869cb455eaf9. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZHNC2382573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f028f2c4c3a7df33bf0b7618dddb8851b59c0cdfafe7313d8a65b412f3b432. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTB52247585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5054e5118bce292713eb704fbb148802c0d4c0e2d532a02a9c0c983b4cfd596. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZDA52366416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf0fbbb0308d1e88efc7363d7c57c91453e09dcfcca8f1b2491649edfb5ef21. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZFYY2313867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc6a72cacbd509e1fa608c0be68ce6ba00a8989ab7b0c80fd1eb2ae0425e24a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6N2368184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376443e622840ae22c497d2e88bc115f1ab9ff0a540de22e3f198a5877950f15. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTAW2259155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674be579a92c32b1a6523891d5233e6e2b8f4467de6ab117f75dd0a2140645d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ22521877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2761a2af8845620908673367b65436e14ae4ee5a89c709b61faf8cc4d74201c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QT3F42518715.