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 0x5b12083f47eb3388060150d26f94aadf988edcad8db0b5e16363bc095ce207ee. 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/f1cf1f4a-f077-413e-8ce0-49d3cac169d0.json and https://artists.proofprofile.net/proofs/artist/f1cf1f4a-f077-413e-8ce0-49d3cac169d0.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 0x3508df89a067df51a86376db7392c298ac53ead2f786e0a87e8228bf8066478a. 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/QZJRB1911697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7941d92a8a3b27377007127e529f73e315fcc6b0b43a089ea30b7f5c603ac967. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZHZD1990078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b909acf5bc60473b43b57ec2e2d35f64c5f5c4c10e24556a1bcfc848d260525. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:42Z), 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/QM42K2060540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a932d10f25c4e4ea07dfce66953a79c18a441493a4c7f13c650c2f3374eab32. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM42K2097514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd78dee228292f8decb168de782b4d472e341fba22766273ccbf752b9679d68. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:23:12Z), 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/QZK6J2082300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd25924c81a70d3fb1c0e34c91b4fc4e4981b8fc35ef0d14d911af091c776ba1. 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/QZTH92248538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2c8c2d03b46867812e448359fb05c8e01ab7a5f1daf95d7596f719e444b500. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX452249277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a297f8a95849b4f679a53c2e40595a4a7d144b4dd0243062c3b1ce8176e735f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:22:12Z), 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/FR2X42403497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bf5ce4bec8ae078766ee22ed5d5844009de0636a99ab9834bccc55f9a76d4e. 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/FR2X42403499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fba0dbab5b53fe4484c6555fc42e91c8f5d509d47d9f19b3ad58970c229e742. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42403500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476688a7468c4b382b8fa4bcdbcd30d2d5ed41639be735c765288ab9385b0177. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR2X42403501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc0bdc563e6d8618b19903d521fa85a3365d967914731b7891623701180ccb4. 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/FR2X42403502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ff1ad2f3cebfddea64e80649c24b535274ce091cb02bf4decd965fdd0bd9dc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:09Z), 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/FR2X42403503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565e46287a2f9675d40a0143d0342d201065eabee4c8ee262738a099c7153f11. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0L2474057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb428f645139f484f43608abca3fc31185eebdabcf873dd1d19538e77524b8f4f. 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/QZHPJ2100259.