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 0xc36299f590faa1e5a139ae5928a983f97068cbcda226f3f4a1b9016b879d0719. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d54928-9419-4e44-9c4f-81f5e23770d2.json and https://artists.proofprofile.net/proofs/artist/32d54928-9419-4e44-9c4f-81f5e23770d2.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 0x4e6fb427252d18952883810eddbaebf344bf4ea1150aba7f460c965f65f7e380. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FRX872176867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019d708ac375739a986eb80402a0ad020ab480847456edb9ecd6902d53c01d46. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX872176868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237eea217519e61e0be8f9fc00fa986faf9f53042dec3f8348c1bcca1d5ca7ca. 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/FRX872176869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36561de69b85c3abe1a3fdb4636aef8e2b6bc617ee93484df6f8daf944f84cfa. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:28Z), 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/FRX872176870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1d3b7cf2c857e3b3a8a4f418074e7298dd833120a9a5dcf6c416d86a678b3b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:38Z), 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/FRX872176871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f2e95f5886de342d14e83655f60dec9e1c7e44dc95b8a98cfbee0b19f60eb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX872176872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624fedfe7d6ce8948285ae90285ec42d12ca965da564d31738101533f3137fca. 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/FRX872176873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d3bdaa555159e2d756b459907de2b0cdd5b875f0021cc424ce45085c1a0c9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX872176858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55ceffda4504adcdedb0feb1a57a6368bc1daa17f57e411794ceb939310f5a3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:46Z), 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/FRX872176859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d3c4c18892daeedd71f7dafeb5248cf869a085bda5398250c95b730501892a. 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/FRX872176860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53e1eb8c7ce40f4a18314ea1732cf9e16d93071b60f4fd29d1a577f7a4e4a85. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX872176861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abea52e32d2603e0e3fc78e46068ced22b2be2ed2b607a23cd9062beb6930e4. 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/FRX872176862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696442a27ecda50f97f0e71afff188f35fd46f853350e36d4620f4850ed5ab58. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX872176863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c407b2d7bb207a1d60c9c3018a2a026f1bb58b5b561d2c16a2e882177453d6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX872176864.