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 0xb282c52f158001c2223bc6871441f7f2906b0b8e121fd1920c90106ac9cd1024. 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/bf753b5a-cfb9-4ee6-b848-71be7f977c6e.json and https://artists.proofprofile.net/proofs/artist/bf753b5a-cfb9-4ee6-b848-71be7f977c6e.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 0x4e839b332b418e5eb4e25c121b032f8b1c9b319c5a822b2d619e278ac5a1aadc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZES72145129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aa42bdce5b4985b1cb891fa2907d1e2e6953715f087d3665772ce95f015d48. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE6XY2192139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425e456f1d820a990075b6fd3b85c8ed08bf6e03a50dec75a50c5a1a81049e6b. 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/SE62M2108425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3496be5a5587a3967b7b094cfe9204c2e992da167f258791310d3458283e3565. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE6QE2242169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53685eeaca883a3c514fa0afe041a87552437bad8490628982e9eb8af502071. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6SA2269038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dcf34659d1356361ae34338ec652ef47362a8b2fc6d131cc8fde0006900c82. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6SA2295720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafb9b8cf5cebf27e037dceb86ba8574a195d748629d64588d14d661e7d207d1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6XY2295253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390e57248bbf95683ba2f0a5e31354e1275a5eb1a78396f9be70f9b80389acf8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SE6XY2295255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca362579a265ecf29d0b425b17410bcbce6ec5516e612d9a47a7ef311cf2fef. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2295256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2577156b4afaaa6188409decde816437c380eeea0c77f39fae3374d5f075347c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/SE6XY2295257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9504a2ca2814f4dc5a1df7ecea06975c5cf54a6fd7afd6367311b570ee5fd572. 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/SE6XY2295259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016fbfd6829bd204b33366b1e70d4bfcd223c5ddacd0ab7a0bb3cbd79ab9be18. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6XX2259772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3abf5d80fcaefcee7f86ecb88780ef7702bea8f210d62fc2784c5abe60c957a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SE6TI2363668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16deb43ed33778a33440ac7f6b8aea372e9f091f7b39c485da8c0b2eeadbb1d6. 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/SE62M2387545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829448203680d90bbf84ad3c34a52e3acd4c959e2bb22f09edc49c6099876861. 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/SE62M2308506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7b17808cfa657acff41650b20ad4a609c792c8d93309377be476a34371702e. 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/QZ5AB2485226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9206ffffda5c1d02f1d3feb2f279b00693b863297bdd91cdb5fffdf83572cb2. 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/QZNJZ2476261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7db5a20c41e5cfa0d47dc00acf6f9396cb956806d1d1d800efb09b69e2367e. 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/QZTVM2445841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec66b391fbfe4a35a413186e7e244702588b797a0407bf4bbfe4a4c6f8a9c89. 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/QZNJV2433065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d25cd879073ec823ef1f19c79c064788e9d4759ba2eb36af24c128de469bd5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMDA62317216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784662362fa44a6ef4433b383b1120b544b963d75cc6b2385a075ff9894da258. 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/SE6I32474259.