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 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 0x77660206e846f73b15254f140551f0b631236919472e62afc782a2702ff70f5e. 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/2c155927-c745-442f-b62e-1176469f32d7.json and https://artists.proofprofile.net/proofs/artist/2c155927-c745-442f-b62e-1176469f32d7.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 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 0xe359a0129037e48a6d4f8061258f898fc40ad1b81c52f0dd4eb509e2ed1fb8c7. 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/TCJPR2226730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf9bfc3377462ce59d0d178dda9f94176e5ae2b88ac43a9757cbbc8a35c3bd2. 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/TCJPR2250503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12dc6c15673900364e5bb6f551d36b74007cb4b9e04b9252abe21fd829ae2f1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPR2250590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2599098d96f8d057929bbadc4792ca7d02c7b76cff88f4a98e96a0c48ad8afa8. 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/TCJPR2250599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc45b2a998cbc0d0e7ae14b1801efc276105f8c4763dc1fb82e697d3dae4d240. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPR2250643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf9bfc3377462ce59d0d178dda9f94176e5ae2b88ac43a9757cbbc8a35c3bd2. 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/TCJPR2250503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12dc6c15673900364e5bb6f551d36b74007cb4b9e04b9252abe21fd829ae2f1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPR2250590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc45b2a998cbc0d0e7ae14b1801efc276105f8c4763dc1fb82e697d3dae4d240. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCJPR2250643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaf0fc45bd589639cef71c03dd770e6da09543891af3a39f96a3fcc1664a17c. 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/TCJPT2291026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f77ec40704181b2e9684a854e5d3cfd6ecbbf041dd3d64602a36990bf8f9a14. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPV2338649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb539ca4c45b965e937d65c404d3d66f26f8636574205ff22d7c97330dddbc9. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/TCJPV2338654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb407d8576d3372aa6c2d3c8b2963f392743a0fdcbe0bbc80aece333407b47569. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCJPV2338655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454dabd40a2e85cab6c31aa96a1347920a1683dfc9a14c365924eb82f7d7838. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPV2338659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61aa5f1d74e51922e7864ad6e2782f02d441ccc7b322ddbc76f4cbd70359441. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/JPY202400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483759d555ad5efbf1ca6a62b53d2a48aab90be4e755dda35a2e6a78c1007173. 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/JPWP02100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4f796ca2f48e46c1a847e081b55feb903c4ac7a778829db3e54f583abe90e1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCJPB2467332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005d0e6faa382c50293c20c776e0a5385636ec31996372351ca57bef20bf59a3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCJPB2467347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571eb03d4aa0bef70b78f6f6ff6656de13514f7c766ce6684304f7dbb57be4ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPWP02202257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca6b00d611854d16c1dc3e40c40e9f8303e4716c6710fab8c981ef90780d05. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCJPS2254459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee524c3cc733f1d817de453fc8d52e6c617244b55a4c85920d002e0912a3696. 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/TCJPQ2157148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8be9609342a88a717843836d17cab6604f9651b2e441089b721804f725647b. 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/TCJPW2340713.