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 0xd3735f888b1ec5bbbb34e5db5f20d1363122a41a50601fe7b380f64a14afb132. 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/17c5ba8a-b5bd-4400-a8cd-5530a8259242.json and https://artists.proofprofile.net/proofs/artist/17c5ba8a-b5bd-4400-a8cd-5530a8259242.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 0xe7453f848381e1594827409ef6accce8d510224beedcbeb519015cbc40ba9a05. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES92092994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f0cee5095ec78b5ae6575517f4effc473a42001204026e6a2b729657043756. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES92092995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6eb8a61d55c65ae83195ec1b45421e7c1091a18cfbd7fc3e4714dc7c5ed9a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72087765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80ce123a7492fa59f33c0c1fa0dea9d0e9c0d5a45d6f91df5f682381007a6c1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES92092996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36e79e2ab6ff8b799fc16874f7e77395ddd4c7e471011b503b463b519cb2473. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES92092997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f578693c7662dedbaee1a64cbaf809660c82977afa2fd89710b85290d7a140d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES92092998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8301c5a25eb6c84227ffd49c40c82e5da65218d4e83fba0798f4bab2f69db280. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZES92092993.
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 0xc2074e55fe7331cd1addc240d0402f943c206806166a91c50d438fca99d1cf59. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZDA82001658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fcecb6bafaaba4ae1d478a98d7597ffcaad500a2a3526e93b5e9ca1dd2c281. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZK6G2272375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7aec240b2296241a7b018ab0d36a121f548d25b092f22f0b4d85f2bbf5d511. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAS2211722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2fd5d3f8c61eff695d083138bebdcd5bb6c6d6ca1a6a00906a731f29f07d3f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22287838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c7a9e24654ad01350dea18ab1ce475193970c63ce9c5f9edf9f1fb54c3bae4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZPLS2279942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0c51d95e5e1b41f06dbecf8863cfff0a7f6a33261e42bd40e9aed27d1abb72. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPLS2279943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b846e014192a385dc0f2a8b60a7393ce339c29c5c233eacfa7ac2bcbbeeb29. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6G2264588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc00eb7fac4bb6ac6591282ca83fa82be9ca25495ff88afbe522f5ae155d833. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZK6G2264591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44292da92ec9618fb8d3ff18ce85940ce509c61ca9fcfc15ec054162f0f88e60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPLS2279944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29082fe4562c3ed748ac76c0042a101754540d1fc993717b13f39c957c6c950. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZPLS2279945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b656850089b472552a156610454533d04465ad911e5df8f78740f02a663c4a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZPLS2279946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2515686159743c6566cc7afc4c9f66a6412c1d8058e28d4f33e89df139c62129. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZPLS2279947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d772222550b3a94b9cced7b94f340fee0591a60afd77f499b6dde03fc77332. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZPLS2279948.