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 0xcc29880e3260279376041f5f9253f9c41bd2af17f2d8842a83caa3fe46f9888e. 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/20865efd-1d6a-4669-99c9-1a87ff1cea4c.json and https://artists.proofprofile.net/proofs/artist/20865efd-1d6a-4669-99c9-1a87ff1cea4c.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 0x4a8df93e5a48730a9c7b55ccf46e4c5ca90af910dbdc56413be79dae6f8d6fa1. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZAKB2338549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab609bd67ed8d289d64c3b7f1080c0581dd3256052a56f49548f56236f82b5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZYD92300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0498d8c015af514d0b02fa557bbcf1282d263d20d85eb81e469952d7a93e46d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZYD92300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d67157041109810f2d669103f02fcf021902e7fff9273bb193203ac700e19. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZYD92300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752575bb092a573cd9b4f690f5e129e1f434dba28fb488330f59ac2b7fbc66e. 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/QZYD92300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc0bba9bfa7c8d6b37e0e6835c22772437eeb42760f1c3a9a5d8b300fb443b9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZYD92300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310e5176a88c9fa51a84a03b1361d28df0cdcd559b352872f3f9e51b6403a33. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZYD92300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd102fc3f2e4c6559ae44b1cfb0ed3b3fdd2ef51b523424a0e550744d7201f0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZYD92300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6a10ba9da08d9378d01e5a9cd562da364673bcbf36dd97bd122a3ad329a2d5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZYD92300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeed173038588b7e3befd6f21b58f1e40b416ddb589caa67465f44d7c1f8cd8. 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/QZYD92401133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af75caee94b14616fb006b59cb9df7b0855f4f435f401d6df8e89ee4e7aac7. 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/QZYD92402134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6885a3355ee2f269271143139018961071473d5aaba6ef825bcb8b2d6683f2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZYD92300613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237512ebd073da750a81717667814173aaee3421300a11a2bf4f28130ce173de. 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/QZYD92402754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66a66a7b33e395d9febe8ed33a70d727628d1c2a0d8bef4b3a5b03ef541f5e5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZYD92501285.