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 0xfc23ca9dfe2241233f804a3449707b63da8ee34c1278a5bc41428f05bdd6febf. 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/1032a018-2c17-4ec6-b225-4cccbc1fb94d.json and https://artists.proofprofile.net/proofs/artist/1032a018-2c17-4ec6-b225-4cccbc1fb94d.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 0x9fdab38d7c72162ec94d26c1845571d8bd66a40f428d5eea0c35d425254bd16e. 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/UKXN22328391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cce2cf5ae729e567916b7d61a2e154d172381d4257f8972373a2a68ec320cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKXN22443652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe18fcc8be79f625fdb49649bf82485eb0271518014806696294e70119958e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX3Q92409718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1fda08be580cae6a4056b4796a2bc0bce83daae0d839b77824ea79ef351a6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP2406996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4bba23b84f0b1ef979bc3523baa359d79e10b9826e3bf4142178ba4ced68b. 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/GB8KE2314016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93519db1203eac483b474776a3a2059e6a922d181b263c1072b6431ef3c3115e. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/GB8KE2314017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e2ceeaecd07fabf632069796072474bcbf3976eb63514350d03a54dcb0f98. 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/UKXN22249884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7bb4071f069bf9bdd90f5d75f314cc2123056db472f2bdbd7c69d7dab9569e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX3Q92318744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b019b526324c9ee017b29cb90f116cbbeac4c181054c04edcbeb85c90b8a3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GX53U2096511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6bbf61a61ee257764ded039cbaee75c0b3f10a9d2d55457f332449f40b4f48. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UKXN22184038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fadca874cb133a248e58e57a6f789d1081f4a0a23e36a8e138ba93cb4bdcef3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKXN22104924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38912ff07bd341aa9b6d5624f330feaa5b648b2601d3346a92b636055fd6023e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2148773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef2e3979c68eda5e00f6d2e0b7bc6cbb2ee5bf8ea0bc4f4eec2ff7e94bb37f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKXN21967187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f7ac52aaa38f0bbc955036ef6fe81362c53bb4cf4869e8eec343fea7ab9e59. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLFP1961166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8702bdd1292dd9f22d4942c42c954423626825424c14f1915103fdfd791ab. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBLFP2325821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4dffbe6619d033c2f32af2309b2386d107dada2e5305c6c82845dd3fdaf875. 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/GBLFP2041280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4dffbe6619d033c2f32af2309b2386d107dada2e5305c6c82845dd3fdaf875. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2041280.