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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79031094cec4215fbbcf06339aaac358cfd808a06cf7025b48e8ecd277e83420. 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/46a67262-7383-44fb-9c4b-7f42eb94641e.json and https://artists.proofprofile.net/proofs/artist/46a67262-7383-44fb-9c4b-7f42eb94641e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b46c4610deca62b07c403d2a7dac0421a93a89da92a998851b124b031916a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGH1450725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d679005f055b1c1405b2e94755a21de2b70ec9f3ad6117f1dcdf18d813273. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGH1450728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa908c2db57b74d149fe93338b4e3c99e69ec7532d3dec6012bc856d0b8c39e76. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1450730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b42192f35d49ed3c6d9cb42aa57427ea143c36c24797c2cfc5bfb97ed5dab27. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGH1450733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0db6c11cebfa1961457ae1a59913d0f3dcef85689c21b929f467b2d008ac49. 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/USCGH1450735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9064007f757e90a3e6f48f8c747bda560ec12aae20d7666da289e512368820. 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/USCGH1450736.
Sonámbulo Psicotropical - a Puro Peluche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986be5e9b3afed3a5e2e8efff9c6324b136fbc4d9cb1d2fd4735a7f77a18749. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USHM91462362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd595553df4df5d0f92afd7704e2b4e69e193678cd3f49b8bfd21de3e97af70e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM91462363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac730562d77f3f2c567cdd8cca5b2ca41a178432ed78482d84320402e40a453. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM91462365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac137e7a7958c9d96abba797631fc01941f27e86e8795d67d164bb25a0874f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USHM91462370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e58c78d1629c2de594582efdfecb100f868617d712f79b14e022e9faf3cb5cb. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USHM21874494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a90f941b6d01562a8b1d07dff7fc690e99f2a22239c71ffb76420936af90fe. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USHM21874496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05ac6659de62e32d231ca894d2987280342eeaa35144a15b4361069175aef05. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21874497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c0a97f9969bb9ade396c5c44a038cc8c867fbc60bb73e5741ab9f518f7548. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM21874498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0091d9fc62436c2cc8a591ce004c233e02f64ab6e3cfbe1c01d87d0d034c9. 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/USX9P2497304.