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 0x6a25f61e3c5a8c1240c25d557124ba9ed1b7d7d8ae342e03f2b079b52d1b6660. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b582f348-88dd-4114-a67b-1b090f036197.json and https://artists.proofprofile.net/proofs/artist/b582f348-88dd-4114-a67b-1b090f036197.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 0x9d3cb48da59f4b9e1dc8534f6c92769c6050e4be54ee23501455e1c0c2364808. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCJPJ1976905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3cb48da59f4b9e1dc8534f6c92769c6050e4be54ee23501455e1c0c2364808. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/TCJPJ1976905.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93308de75462fc41c03d34ca3540bd9f983c29ebcbf25a3f5c21a96eefdab41d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCJPR2273106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a7ff890c30a10945d11d382cda2e394290eb8a1ac1f85a97fcc4cc0c7a84f9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPR2291526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f7a0c3c5cecb8d29ee3d0dbc65220f0c5de74157f711825c49b555ebcec1a0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPU2363445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b29b4b164d71cd69ef9b188f0fa42384146375e37a77a59c316097aaee968. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPH2505815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b29b4b164d71cd69ef9b188f0fa42384146375e37a77a59c316097aaee968. 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/TCJPH2505815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d54993d488f3d9d9303b227380a511fbfe59b1a572b8f09da9840c64fb9fab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPJ2528160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e3e3af46c57dc851d76ed4b9cd4189a0d7303bacf20e79d9b4e040f92bc8b1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPJ2528170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dfda555c5fd1013b5baa4bfdfd508d80d51405debd2a0a5323d1ac080a37a6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPJ2528179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60176cf8bd4f1f4300ad31ca536c4a726ce12b6f377b95f7b4c85b150fb6f51. 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/TCJPJ2528348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425729b56b851ae2817119a73a68c042c859c8fd85d7103e9b3b221a80a08eb9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPJ2528349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47e851c75b92eb2fa30c5ad3100bc463dd994877f751e680ce3f85050d717f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPJ2528350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e5a2059caaf8367ad95769fed257e6daa78051f780016f58b21cd7643b2123. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPJ2528352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f4a3a5c43a86f2a75b1921aaa68b10ffae3f45380f1bcfe84006c888d06b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPJ2528354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf3194540be0ac9f0788998b1741bca0b378d41b96597ec73bbe7a6031b1e1. 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/TCJPJ2528761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0028b20efb103db9b99ac3d5031a8d92a31e6e3165889edba37f2193a53d98f7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCJPJ2528408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432cd1032e8737a60e07f7f07081c0cff483de66213ec67e322905b755cd7719. 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/TCJPJ2528415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492ece836141cb1a3b47ae595aa021a73653872f01943c16a6b25747e7a49da. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPJ2528432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e549587160e663e0bd4ed62e8acaa875c3e7665098585fdd3c2ba31378b301d. 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/TCJPJ2528436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49fa3ebf6fafe0fa3e8b9b109a1caf2c79ad7deb8a848a1b9d63cb9f85a6f4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPJ2528799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dfda555c5fd1013b5baa4bfdfd508d80d51405debd2a0a5323d1ac080a37a6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCJPJ2528179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60176cf8bd4f1f4300ad31ca536c4a726ce12b6f377b95f7b4c85b150fb6f51. 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/TCJPJ2528348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47e851c75b92eb2fa30c5ad3100bc463dd994877f751e680ce3f85050d717f. 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/TCJPJ2528350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e5a2059caaf8367ad95769fed257e6daa78051f780016f58b21cd7643b2123. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPJ2528352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f4a3a5c43a86f2a75b1921aaa68b10ffae3f45380f1bcfe84006c888d06b8. 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/TCJPJ2528354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf3194540be0ac9f0788998b1741bca0b378d41b96597ec73bbe7a6031b1e1. 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/TCJPJ2528761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492ece836141cb1a3b47ae595aa021a73653872f01943c16a6b25747e7a49da. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPJ2528432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63240506cea31b4f98f325b6c51cbc5cf9386bb15e4a615c31cebfbc0be1dc5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCJPT2258197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7885e0d445bb8dfd568487c7369465d38c717a212398eb590aea7934fd21fbee. 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/JP92N2238914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb024012093b6ff6d6c4ebc0a4005c2857dbebb88a5548989c72d204536be4d4. 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/JP92J2401495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2344d6fcf2a5040b653cb2577d9ce2b99cb64dd9ec84ea624a99abc0b25272f. 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/JPB602079126.