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 0x78e508c36519dd916d350f5ed7dbf1634a5dccf74911faf8ee188d08b0bc3a7b. 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/2dc4feef-4e51-42b8-82ea-9e6eb60f14d9.json and https://artists.proofprofile.net/proofs/artist/2dc4feef-4e51-42b8-82ea-9e6eb60f14d9.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 0x2e0ad3ee2558bb002f7c3041576296e831a6bcf6ef06c203c18b7d7300c002b0. 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/TCJPO2152108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c8c4eaae01a5aa774ae253899cdf538201a31bd0880bbd5885de8074a81478. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCJPO2152127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf345272af611344531bfa96471500188e350f2dc1419e416a4241c009e929613. 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/TCJPO2152090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c07d483da7c1ce382e7aec279aafd29b4241fa0b8368c567528c4e52edda11. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCJPO2152106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0ad3ee2558bb002f7c3041576296e831a6bcf6ef06c203c18b7d7300c002b0. 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/TCJPO2152108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d87edb4d049a9b50887cb8bbef2f56759a64eb2e4aa16c7d1171fb3585ea5f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPP2128589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aa3870bd16b8ebf272ae5e4a5e243a969f251146e2c2d4cbd04e9c397d4e2a. 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/TCJPS2263843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aa3870bd16b8ebf272ae5e4a5e243a969f251146e2c2d4cbd04e9c397d4e2a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCJPS2263843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7377a31a7532e8542defc8c8e561269d08a742da97f8f642a89146a1b9c4664. 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/TCJPS2285026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008562cba3d0ede216bb189359271b5bf9f79ddc3eb3274ad6d75846b03579c1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCJPV2391936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e2252b6e1c700a6058752363b8d9d6c52980bbb60157a4870a781543a3f2b. 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/TCJPW2302145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e2252b6e1c700a6058752363b8d9d6c52980bbb60157a4870a781543a3f2b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCJPW2302145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621610ea4b03b19222828430a2f7c832773b7fe563ed4f1dc296760e3ad9d29. 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/TCJPX2351377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621610ea4b03b19222828430a2f7c832773b7fe563ed4f1dc296760e3ad9d29. 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/TCJPX2351377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a6b2859b20f0b805d96846ea0bf21d5bd4a202055f0b65ff51b15f32d088d4. 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/TCJPY2359491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199eaf85d52107003d2381a64ab5c168663fe0fc90a586e4c9ddeba7606141d2. 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/TCJPY2359498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66af6bcbda5d31239b0569618b407d8e9a5fd66897b069fceb067f82006d7a6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCJPY2364027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98fed422618b815e41abef88ee358df630b4f1416367b8c7438a4d60cfdd9f4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPY2364061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c163cf58f8bf0354ec7b3ddd747b906b0104b0c7404184da33e0df4b0e4bbb0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPY2364101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf536feed25a825b2d1be6fe135a65332b017eaa4506b10bbef9405f54b87695. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPY2364223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a1eb117f6c5df40829a4cacd0c4f547adeb89a06f1fd1b1ff6662d29fe269d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPY2359484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a6b2859b20f0b805d96846ea0bf21d5bd4a202055f0b65ff51b15f32d088d4. 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/TCJPY2359491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199eaf85d52107003d2381a64ab5c168663fe0fc90a586e4c9ddeba7606141d2. 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/TCJPY2359498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66af6bcbda5d31239b0569618b407d8e9a5fd66897b069fceb067f82006d7a6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCJPY2364027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98fed422618b815e41abef88ee358df630b4f1416367b8c7438a4d60cfdd9f4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCJPY2364061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66effbf15cd6dccf2da5135aa08d4b1f960313d1648fe13ac16185a1654e31e. 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/TCJPY2364260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad8452d45a465a7a988a5c74779708b659cf1586de1b2fad85e4114d50af974. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPY2364216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cc11fa5866dd4ba835efca90859ed567a1bfdcec9dd145e0ed5e3a93b9a26c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPG2532604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cc11fa5866dd4ba835efca90859ed567a1bfdcec9dd145e0ed5e3a93b9a26c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCJPG2532604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e94aa3182d5e424692fa3e81a394317a3381320445538643d59d61511b973. 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/TCJPG2536478.