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 0x7d054926aa623a605920b2167e9c9535e75403991a9d883b49f1f11355d54b69. 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/16f88068-06b6-4e3c-b406-91c33cc40455.json and https://artists.proofprofile.net/proofs/artist/16f88068-06b6-4e3c-b406-91c33cc40455.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 0xe3bc9a853d9b35c2b8a90ccac43fe9d32c48677a06b7db18b5d8d42a49b2c008. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CH3461509064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb39c263398effd87acd2e15dfa33391a77649d9bd4276bd622bf4703f48b99b. 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/CHD542000026.
Everything Is Wrong (Pablo Nouvelle Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd63569dd7de80a6c13fe7eea1849368daedf370761aba309050d6a8e5d081ae. 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/CHD542100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9b1d12c45b95cf2b17dc89b221d2e103fe6e1f58c4f3bb95206d43b77b755b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH4132400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ee67b06d84aa48846409e3ea748f112cad4d164650715a1e336317325f75e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:13Z), 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/CH4132400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105fef691255abc86d1bba0ef9d4ccc4af444d9f310ca042d2758235fe9287a2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH4132400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd86b7ecdf77f0d76b60d35549673d455a8db6cb5ec33f034ca7cd4989083661. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH4132400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9b1d12c45b95cf2b17dc89b221d2e103fe6e1f58c4f3bb95206d43b77b755b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH4132400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe74086dae81cca557355993f2b217c8316b2c0bfbbb2e7d1a4de2b87acff8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CH4132400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ee67b06d84aa48846409e3ea748f112cad4d164650715a1e336317325f75e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CH4132400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6370444b4b6ea063eba035a90b439abc6829c8625355a99d99fd8d49029476e3. 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/CH4132400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b660c1afc50f461570b5df77d9a59dee788019590ddee1d049087f22153fba. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CH4132400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a94dce0505d115b2f64e9becd0dce8ee9ba5778a1453a36378e24746c5467f. 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/CH4132400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2928e28cc59af9c0482f596d0a902787d05b02945321b16428012ce6b665f532. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CH4132400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105fef691255abc86d1bba0ef9d4ccc4af444d9f310ca042d2758235fe9287a2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/CH4132400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf0673cacf2924943c5bd753d51c8b486368b8fd05de4808bfff56945a63495. 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/CH4132300014.