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 0x246cb9568ae6a1ce0c4866f98afb0ed426730157200f9738fc1f363ea426adca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b46a317-af88-4bb6-a090-7ed81610ee41.json and https://artists.proofprofile.net/proofs/artist/7b46a317-af88-4bb6-a090-7ed81610ee41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nuovomondo - The Golden Door (Original Motion Picture Soundtrack)
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 0x2b9e82c297ed45a1421470e80d4f2e018ee6207cf06e59a281b42e91bc5306db. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ITC460600531.
Mara la Fatia - Storie di pizziche tarante e tarantelle (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659baa5af4a47999818f38c6a1571cb6f85f4391a394f83197dca5b95a8b2e90. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ITI401000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89f88fd045e92bd236c84d5aa66198a8511700f57b8ee827ac0858e897a77b9. 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/ITI401000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5def1d0db686720a15d160127710bf56c4bb328dbb6cb9847e4a8acc4727707. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITI401000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23a7204d1833033722033b9e32d2e0d783d6c9d8b9d8dc8b1aebe73e7a858d. 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/ITI401000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80891c872893ce859d7705b7c94e9cb0236769d92e9d3ead63c2b3b147a70a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:26Z), 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/ITI401000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7097b1c8e1eb98722e4107e5842fdc3d5b275226fd620205ff120aa2c3e96df. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ITC491300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7306e793a9f38ab91c5f6e0ce3c13442accfb102e259b435e160e5e85855a756. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:26Z), 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/ITC491300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6b55e5e69d082daba561b44c99f71afc5dbbbaf49853a5d6f88551fdd230a. 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/ITC491300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cbd6b4a7cdda7de1b06354722a9d92b86aaf38ca85aa086fcdf9f702367f90. 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/ITC491400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0f9040d83da7649768ffe903f6cf6aeb053e3a87cf6f78732683477dedeec1. 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/ITC491800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06b7ddb1400cf3d637f883b346e04ef09b6c6c48e491d0be070b9b7b02c31e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:10Z), 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/ITC491800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fb171f30c909fbaf4ec34e824a23d30b242dbc23b9df4523968a850169dc64. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:18:48Z), 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/ITC491800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0204e36003c46a218ffe93f32b7612ce0d43976947448f260b25db6df447b54f. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/ITC492000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338eec171e2e4730084da3a647a9d65bf13b91e3b04eb5e4dab829e09785418c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:24:59Z), 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/ITC492100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef36689b3ac237ae7862d7375ac733e22b2ff759c6ceb571145ccf510f7ae85. 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/ITC492100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5663132e6bfa31f8e7f4545fd5fb0ce1e4a246148b3206b621de83768c113bb6. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/ITC492100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465fb4548b6340e05a647508a32ca587632f9f26b89ec5c3d628d8eee4744a00. 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/ITC492100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9399d7ac8af4a6195489ab2e6b676ffe97ca8627f5e3bb2a4a6460604b5ceaa. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJN2541505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc42b053eda5271b8622da0ad4f4fc7aea5b79dfe75f787c4df95e5dee69fd. 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/ITR952400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237ff3cc47727c441cf7678eb5458a67dd7bd8e0b0b0036e2e93a99ec0e879e9. 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/ITB281500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6bb873e47b074b9889ab0b5475b1fcd0823e42fb7141a8e79a7f392adc6ee3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ITB281100054.
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