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 0x4ecf4e0643c8e35278b89516f0eadca9d7cfc579b33613702a741b853d302faf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/850f1166-165e-42fa-86aa-41f121624bbe.json and https://artists.proofprofile.net/proofs/artist/850f1166-165e-42fa-86aa-41f121624bbe.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 0x6014e5455956d0d798cec697dd7f39d9a788e59ff3fdf1a90c9285760b8877b9. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/JPI541200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4686dceb9157f8603226eda6722cb7a46dcc6058790f528b4372724d09d71737. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:28:51Z), 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/JPI541200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc098bb7e9098977545196bf4eac2b8b09d8cfa560016b445f16a9ca03fe5ef9d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPI541200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f165de083b2a2527a2c190ac005656322096b2b5b50c16f8607dd29ac3bb435. 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/JPI541300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257b9a0c962e7e830dbd37e0fdee1539395d3926317544daf3e0138485298a4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPH941000849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43b757ee28f19cb26fcdd70a8fd397a9865631d0545024e0ac355759b7a7648. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:50Z), 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/JPH941000902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6533d71f09bed49cc8729b0b6fd4fd5750240696055f3ab35778b4f48b9b0c8e. 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/JPH941000904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7387ddd9eabf2853162b003f8e5f726733c05736c8e1fefae9dcf2dde8e087d6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPH941000905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac636c61ef017ad09d4e62f1158880e7bd625ad99dabe5a4e860067ac2c7de. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/JPQ631800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad009c46bb7205f53193e0e90a198852f1acf3355a862cf8373c62e2be914211. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPQ631800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd572e2a07fe63dca7a40c320c13da1d06acbdf4ef0edc44bffefe4d2f5cf749c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/JPQ631800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7b4fc27d612dd18ffdfed48df8224ae060ba08d9bd6e5567732463bc247d5. 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/JPQ631800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd667af7f89fee09acf22297665bd52801aa7ac83199e0ab46dbb5a05111bb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/JPQ631800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4394b2d5427d29677548faedc3ea905dc9e734342c3f4a27bc651faed42236. 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/JPQ631800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d2d933fd24de2cb2b71eafa517b1cc9f430fd01be2de45ec5e028428ea8ab4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:42Z), 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/JPQ631800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0484978868a720af51faab4b662b1f595071b1984528bb55e41991191fb7516. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:24Z), 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/JPQ631800098.