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 0x1e42cbd82d2ca42381ed29ae052c0396b74b7092618a022fe993090503e40ba2. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/902cf46b-46be-4246-ac0b-279e59239a11.json and https://artists.proofprofile.net/proofs/artist/902cf46b-46be-4246-ac0b-279e59239a11.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 0x1d642da27fca59a3ed5d6298c8ef1fa3119e29b2034eab73552c633f9b5d9737. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:03Z), 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/AEA0Q2411840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a39a155ba452835c63eaec1f4b61c04f5ec8809de6326462f93e7f7214c794. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AEA0Q2418188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773683f39a859d30efdab07a12036e85cb53a537ad8bdb7bf97d058de967d83c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AEA0Q2418189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7522aee265e45a94ea89cf60729c685c77896b7727c66a5ef5a49096e4159f6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:33:46Z), 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/AEA0Q2430573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4787f3db0b2f2349a6cf8ab1882a245cbd45727c3006920862316f39670ba590. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:28Z), 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/AEA0Q2433970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa3ffa15eb838c1d38cb5992ec9cd6e040d77cbff7a2b1916d0d709e41ab851. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AEA0Q2429715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93c77987c00601ae6531c94b65b68fc247d2534c1a6fcf174909e66efe7c75b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:36Z), 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/AEA0Q2476732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72ccd4a8044409d9bda209ffba9d9e13e54524e3d1db36bba41fc14231d179d. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZAKB2453832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc70a223fef549cdf484e9f2f8d2c10b0958831ba9000d03547793e4c6ff55. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZAKB2456021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc70a223fef549cdf484e9f2f8d2c10b0958831ba9000d03547793e4c6ff55. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZAKB2456021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a4fc1f252e2a70add37c2a3e646f5b53d6e8efe0f4f1a295b4293e593896a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZAKB2461100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a4fc1f252e2a70add37c2a3e646f5b53d6e8efe0f4f1a295b4293e593896a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZAKB2461100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30270e4648e14bd5d9c0a219dfe3f363961f5a9de39a317e7672deaadbb65c0d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZAKB2462492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30270e4648e14bd5d9c0a219dfe3f363961f5a9de39a317e7672deaadbb65c0d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZAKB2462492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc024515c94532ec582b084a4500251a2d14427ead1041405596339bbfafb87fa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:35:07Z), 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/QZAKB2465332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbacf16c1997982847a66e4561dfa200f417601c2e37b999b640958481700795. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZAKB2471764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18892dd1181d5bedd4a6613c29711562a49e84aca78324cebcff1e458be2df2c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZAKB2471766.