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 0x0641900f2658296291918a4e0964cf5844540d8fce88b72b8d997b47ffe25294. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff052add-e50a-450c-9898-aeefd23931bf.json and https://artists.proofprofile.net/proofs/artist/ff052add-e50a-450c-9898-aeefd23931bf.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 0xf958cbe5c35fbe1eb482c3c389e40c65eca01d00777406af3786f372ecc211a0. 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/TCAIG2459568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12fa4dab463d1745bb34cd7c097db280e8b785fb076bce8f6ab8d8d7dffbd2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIG2459575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4cbb27c7dceada468386a951bb5992a0c1bca7387ed4ebb44ef3035c1aab30. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAIG2459577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343e0111a2ff4bd07a66afd291ecc979f8e3859d7b4dc54720485780ec8af05. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAIG2459581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a7b848cc5e7d7b06b5aa65f0dd410250600417ebdb91d6648941fe52de1a69. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:10:01Z), 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/TCAIG2459583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7dd7d3eacabefb6abf145188e75df2a060584701d18d503263a8b6f087700. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIG2459586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6f14472f28da41b193f215ff07b5d65e834d939d6be3230c5d363f2aa8d89. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIG2459587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00648fe762789844aa9318d6f6f57d0034e5b00c2c92efb2598c8e4483e3c0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIG2459593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e6648d22ca55d1d6412b9de9e49169d4510a22da267417eb94e0e00cb6b236. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIJ2479062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c010b4453220340043b47b77d282a7dff1fc6206546ddb588854edd972bd6. 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/TCAIJ2479068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895e9750987600ef772ac8bcdef43cd7d11945c36069b4ee0ef9c45f6a3dada. 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/TCAIK2479071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c21749b9c33c900e5a800221c1eb9cb552580625a7714a9636d4d1a036da58. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:15:52Z), 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/TCAIJ2479076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb33bf17d5b8e2779d2151d80bef9f90fa000372ea1fe349ab9c98a02e35db18. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:15Z), 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/TCAIJ2479081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1671cdf365f2c729bd46359fd5602152c71e8f0526d90a01e341b4f803c1c3c1. 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/TCAIJ2479083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8577c248b80f3b30384f0891cb3871590ac72b0fb4793e661025ac76adabaa84. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:45Z), 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/TCAIJ2479087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd5ef44850551cc039570e4bfa93313a97430983daa55594f91879c4c40d418. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAIJ2479089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e1f2c46bdcc23c6432ecc1e8987dd18da163337927cb47c0308871e42681cf. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:27:46Z), 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/TCAIJ2479092.