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 0xbafcc950186fb91c7ff772c21f3dd8c006c2f58dfcce1cd232335a2a799c5fd9. 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/24c2bf4b-80ee-4225-86d5-6372876df587.json and https://artists.proofprofile.net/proofs/artist/24c2bf4b-80ee-4225-86d5-6372876df587.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 0xafcff0b1da10140e4f47ad2f12cf219f4dacea3d11813a2ac56782eae8111fc2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:07:22Z), 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/QZMEQ2434253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a22a4c6c0abfb6a68b22204a1ba889d4d541255fe087247c1a4b2fac0c2481. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEQ2419133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e6458beee0dd587f8bbd79391bae32845db63d30af433fb4e24b2f48690755. 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/QZK6N2466299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc3eafbf7d937837efd8559b9af538b54900af2877fcc76fe41149fd19b56b. 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/QZK6N2466301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c384bff3f9efd8406d5ed352ffe357406f8aac9750ebcc303a55869fa64bf71. 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/QZK6N2466300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a32cd68cf21bec78fe17e73997f6b50c3f10c490b6cebab7509cacd63644ae2. 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/QZDA52481026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb92c5d3ca3827b63bb6e5658e42771a813c20b01b8c30e701b18d5300a09e4f. 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/QZDA52481027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd102c04d92025c0024074161608955d7fbc48fc132911964d1a5b71e2d38eef. 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/QZDA52481028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a3ce13b46b4064f45db814f4fada5f4d80912f95594586750262bb369c9e02. 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/QZFZ32464726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b199a322636f3f2c8b918d5c31ecb0c23bb8049a9dee7f13f682edc2464f962. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ32464727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6db09c7abe7392f04570874754e27741b37d3c377c39eba2347da5357c993b. 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/QZFZ32464728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a3ce13b46b4064f45db814f4fada5f4d80912f95594586750262bb369c9e02. 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/QZFZ32464726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b199a322636f3f2c8b918d5c31ecb0c23bb8049a9dee7f13f682edc2464f962. 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/QZFZ32464727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6db09c7abe7392f04570874754e27741b37d3c377c39eba2347da5357c993b. 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/QZFZ32464728.