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 0x3712f2e8868aa3ad9c98473beaf3b56ae66d857b0ea72d08d5654e0b58b2421a. 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/378b2a31-48b6-45bf-a0ac-3884ca86e6cb.json and https://artists.proofprofile.net/proofs/artist/378b2a31-48b6-45bf-a0ac-3884ca86e6cb.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 0x3937df9132106f1ceaf5420597d7f444bf8928de5cf2c92c3697d58502b7765b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/MXD782000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e1f137147bc4f27b17ed327f2e6413c13975f0fc6a28eadd6e556be80fcfa6. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/MXD782000254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7053d684f2e74c39bd9224edf09f36afaadfa9ad1e70c824ca4be2b898f89b71. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MXD782000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68ce23c5e60b28d33f70b7319bc1ea456c92079e0b647e7920a0d72e8fb971b. 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/MXD782000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf5c7393d22a7993b3f2e6bfbab9621682811fec6d3e17c1bbcc1aa2e3a57f0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/MXD782000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf398c819436abfa2ea658a31cbbccf3e2b7dff14740202b4ada6ffc14e0e0c7. 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/MXD782000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa58de9bf1b259b8447dbce24b75038fdde4ac0886ff4300400dbb3bf0e161. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/MXD782000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c744abba68cb501e3a82b7c4b8a337a81cf45c79ca5c4aa517c5c216519e81e. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/MXD782000262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24f60cc2c3c7bb700cea0fe4bbd1b03a111543faa84f03baa95d2df83db18eb. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHZ42004490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e10ec87cee90f6dba663593e1fb983574f41b291e76e398d0e2d345bbd6431. 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/QZHZ42004492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f859d108eaaaffd7acf49c248b5f2764d611bb836c584e2dd466971cc819c5a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHZ42004495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fc6e339f5bf0121c3727c97c97c96a1c95019dea902ea636954cd49eb9367b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ42004501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba34b05030af9d2aebff6bc23841e500c7e16c78698487fe87d925c433eed7. 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/QZHZ42005461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf378c1caca20b39829d33c048201fd5d67a4eea150d6b35ccceed4e638e140. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZHZ42005470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d057e54d0f839b67810ca6b9a551d53d8446528b1616eb909d7c2f0db7b9d13. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHZ42005519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a555c503d48f7400645d250ee392eb2d173cd824ccadd40e3612c841c5b515. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHZ42005523.