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 0x4497302b5fbbd9065db0440a65e6956206b96998305a67a7738613d0e392a64c. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9903c54-3455-4351-b5de-c5ccdcb7acaa.json and https://artists.proofprofile.net/proofs/artist/d9903c54-3455-4351-b5de-c5ccdcb7acaa.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 0xc4b40f142fbef622abdbdb8e4f2d145adfcc397e0c8213fee0b1b49a15ebba75. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ING211005624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc469236ebc140348c0abaa45e54f7c05f3317e9c5e8e2f1667c9ace1e31bdfd9. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ING211005659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6261bf2d8055bdd163aedd87fcd6fd1fcd97cfbb6ee0000ea0a89c8ca6b8b4eb. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:32:23Z), 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/ING211005787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372ff117fe2346abdef908fe91201409feaa309a58f389459dd10d5922d4ab90. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ING211006406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef865cb724e5a10bcf62450ef9be82de838a3a92b9fa9467f388c8568155997. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ING211006482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc366f7fc47a2bb7d46f83c3c1971dd42a304fb4f9857afab566a5ffc7de89a2f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ING211006697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29d27505c2d4fcc685fab225369812ad4212aae27bea7042e295640969d0242. 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/ING211007633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea48727f8cb702a55802ce15e2736f707112cacad1a385d3fd26f0ef1c821e07. 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/ING211008127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed1c75f6379f77a4cbd38e589dc9625d96b7a96a2b18458a736ce3a89887ad6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ING212308925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f9d8e9d691f92e40ae5d1538008a7e0bc271711219df56543b30cf0bbc06f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:08Z), 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/ING212308995.