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 0x9eda502746db759ea67b3598d6f4034414607b44b90588b97e88369cc15ff713. 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/0f58bf8b-64b5-47db-8861-7c0197af8d35.json and https://artists.proofprofile.net/proofs/artist/0f58bf8b-64b5-47db-8861-7c0197af8d35.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 0x0fd7e12a2c01370b146cf6dfd458e20d3955c8b064f07242aaebf1dc52801d04. 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/DGA0H2479502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad9c111d76b2555bf410129b2783e841b54260b2dca3abee2f76be5ca49705. 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/DGA0P2449019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7cd3f074a79f6f71c56e9f43a8bc6236004a70cf11a661723c3625d2b9496. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0M2470579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd7e12a2c01370b146cf6dfd458e20d3955c8b064f07242aaebf1dc52801d04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0H2479502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9c4f8357370e9a0ab061cb33fe2f8a338d5a68594ddca52cae47ddbbdf6736. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0L2454692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd401ecab31421643fc26283c8132f13d8b48f7612c1c3f3bee775e822eb301. 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/DGA0P2449020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a8b1f846e43627116179ed80e5247cdc372f1868a2ea648ff2cef4de4fc3ba. 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/DGA0P2449021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7818a185630336dcac95ffc5a2ce1a9d9a4bdbe11e2c577c49cd013409c62cdc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202453746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124001db7b5adf8875bbe5f5576f84d0f085bca713987cc94ba916ff4db5e9ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZN882245718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502519e3814eb8655336dcedd7d166eedcd61f2bef0c076075437a07af5149a9. 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/US3DF2235152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedd73f9db5fdb7bef275b14358ee94348252fa805bed76c093ca536f62e3828. 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/UKZGC2406285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3dea4f36a6a49fb9815124a613a876ffe4b98bb251f5cdfe35a39e6a548715. 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/DGA072435437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9c4f8357370e9a0ab061cb33fe2f8a338d5a68594ddca52cae47ddbbdf6736. 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/DGA0L2454692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7cd3f074a79f6f71c56e9f43a8bc6236004a70cf11a661723c3625d2b9496. 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/DGA0M2470579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3dea4f36a6a49fb9815124a613a876ffe4b98bb251f5cdfe35a39e6a548715. 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/DGA072435437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99de559aa5bb5aa3a4f37e300710a6741972ebeb41a38e5b4d15c0fd7fe8479. 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/UKZGC2305342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050b36976733d956ea89371e4c0259bc3ed7eb64bfe073b2b135cee8b3e81afc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX202513897.