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 0x0f2dea0754697bf8b6e8ab9af2c7c2ad729f33d42b0f6122da0d3ff758cafc60. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f34826a1-f456-499f-99ed-acfa65d9054e.json and https://artists.proofprofile.net/proofs/artist/f34826a1-f456-499f-99ed-acfa65d9054e.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 0x4ba925d63b750a5127eaa2b6335b5165597608336c163c0b17a5f4b573728c78. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SEYOK2414759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3925468006ffc0fc6e50b4dd525d31c76e547e41b20f4b2b6eb6eb053effc95d. 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/SEYOK2421372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514e5065d3cf561888369c967018ed7833a7192635a1cbe26d046181bae433c. 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/SEYOK2328512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6037d3f139546aa5bbffc6b10cc139b8c339087924025d408ff5bc4be43c68. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/SEYOK2421373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814bdd21f16d3844970c9c7274bebe13d08ccb9a13d35c8a56a994abfde4da1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SEYOK2417375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fca4e6e314af0d64e194d9568d082709ff7dff333f9e5e189b37bcd1c4fbe51. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SEYOK2421374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0399f06be47ef668ce8ef15fbddac5a89287a58099a5619d0dee5ff822707. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEYOK2421375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59032e6eae690eb28ea8de6cbfc5fb486b8e7fb4a50a5ffbbd2fe31e7881473e. 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/SEYOK2421376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c346f66c260ed513226e1ac13d863ca622a0b719ff04f3876e454896cfa2d. 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/SEYOK2421377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0191383c77f68ddac2a4490342fe9ec91f9c6198b042fcbd69aa2290c6c4998d. 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/SEYOK2144680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcbbf9d69729e5aae6c4daa7c7c9512d7d55de5cb300cefa12bcb24b8af53a. 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/QZ4KD2205302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa119f88283b2a9c551dff94b076ac39d087e13171c735ffe28f23622cd3b140a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZ4KD2205303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8818bd59c0f93cea824c85c61abe037d1124e654e717d6ee0e86429eeed0418. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZ4KD2205304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8968d940192c60011e6f7108a9da59a2b54753b1608e8aae2ad0390981c5bc3e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ4KD2205305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702ff31fdad2a6e5e3670285f9347b31970fdc1b0762408e2c9d32d95658dd5a. 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/SEYOK2200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0c9891476cc96ec705f33301e28919d51d30ee97cc2dbc4776117abcea66cd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZ4KD2205307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012e95b18f3f51189252905f1c6732ce85f878c7c31d55d186f6eea0d4d6a269. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ4KD2205308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c346f66c260ed513226e1ac13d863ca622a0b719ff04f3876e454896cfa2d. 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/SEYOK2421377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814bdd21f16d3844970c9c7274bebe13d08ccb9a13d35c8a56a994abfde4da1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEYOK2417375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba925d63b750a5127eaa2b6335b5165597608336c163c0b17a5f4b573728c78. 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/SEYOK2414759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514e5065d3cf561888369c967018ed7833a7192635a1cbe26d046181bae433c. 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/SEYOK2328512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa20d7adc3841b1110eab88cc10a03e0a2150e773b37061b9ef660bd1a00944. 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/SEYOK2239485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcbbf9d69729e5aae6c4daa7c7c9512d7d55de5cb300cefa12bcb24b8af53a. 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/QZ4KD2205302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702ff31fdad2a6e5e3670285f9347b31970fdc1b0762408e2c9d32d95658dd5a. 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/SEYOK2200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0191383c77f68ddac2a4490342fe9ec91f9c6198b042fcbd69aa2290c6c4998d. 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/SEYOK2144680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200147a1faa6d1f9fd58a1354094c0649874d94dc5df8ba9325f14249db45b04. 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/SEYOK2123927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47200122e83e29276d24a3db9c7f01c151f14d43cc467a2780ab0c04062f95df. 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/SEYOK2051736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d9827bcaf4156bb88866d628286cbf18df81f9e11f4a264370fb5e860befea. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEYOK1949781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f54a6bda02b4584eabba6a0bd9fbc6da43c7e1b3d92a7c45fe805a6f9782d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEYOK1949782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74221c770d3fd08743131bfd1fcca69d2ea46bc52cfaf3b68ccc4a751b04749. 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/SEYOK1949783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e7dc9d1a4e7f2a9bdc8506fdc87b59a86bd283adc1820a2a14ac5bbcdc66ed. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/SEYOK1949784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07effb997dadf9b2cab5722cb38966a0bc9734e84a1f61d6638f56a0533aefbf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEYOK1949785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89064e6866820a6668c3a516b48842fe627f455b60f642c55e92c1cd0b250845. 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/SEYOK1910411.