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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d551c2fbc6adf3c0b0e721b27b54f75fbec7434650269948d2c4b14da7ed992. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d236d5a-8b32-42a8-8388-42bd91a849db.json and https://artists.proofprofile.net/proofs/artist/5d236d5a-8b32-42a8-8388-42bd91a849db.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5537d60d506bb84ec1ca4837b6cc38740b1f78c85b3d3356baf2fad129a04fac. 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/ATM890601024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0769100afebd2b40a8f8444504ee2a4dfbc2d3de7a5e176b7c7653995f1ca1a5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ATM890601027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fe3795c10ec4731afa3c18a2ba327205a66197a1a182e73c8f22924ded1e6d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATM890601029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393ef96e91da540971593594326a1cb1ab4461bcb0d849574a5ceaf95bea3d9. 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/ATM890601030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde2546b056fc71a1349f8c1f45ae8a4b6bcefeccf3b7e2e943e1b9ca3d3ac1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATM890601031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851dfbee8dfc6f30ec598de92d84a6d95f8da9080cac727b63b7ff26864cea52. 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/ATM890601035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8a1cacd4e370b864fb78927974d5a2e96885a8b2e4b232bd718a92f8845e5. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ATM890601036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18509e67fbd824a52ac1ded351f4af7746efa6b7ad8591e160926dbeac35dd7a. 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/ATM890601037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f8bd09e6b7322606090b4e7c4fbd97821f2c712a808dd5bb5355df1f7b6cda. 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/ATM890601038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d67fa8d82808a6e28082d584962ff142bd60d6f61a26e1bee403219a20e100. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATM890601041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec41783ab68634b0592438c235b8a4abc278d602334fedb758ea407de2d631d4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATM890601042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa772438b7c43781dabca6efced008fc4c8eb7f35422c8440d5fa665a2ac83527. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATM890601043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93872cd43031673e55d22b56f0871c4a931b167b84c9cc45840611efe74c3797. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ATM890601023.
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 0x674cea9e90d59a48900dd72ed52bc9131646fae11c45f6f94f68230a8be099a0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ATM890601025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5d2e7c4d85521f37a8f94202d78954348531f2c663428216cff00f99423f6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ATM890601026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe653f1ab7677d4d34a8618476b2283708c06163481acb14076585a40c1aad. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ATM890601028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17db3f7aa272b9da1b65225e1fa3114b1ed521001546183cef713ddb51590a1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ATM890601032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c574d69368881e230b2941329847c25b5d89a13021666d7b02bb71249eb076e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATM890601033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483b6364c59cb78431060bbe43cc5e2a6a31d7bfb384f88a0113207c08e4aed7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ATM890601034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13358fded846cbc07e45f737da1645ed8631017b03a422072e7516891b916b5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ATM890601039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec4d5f4d8f55bf208b4adc0083d8e7f819b8d3beee779f26be7e84da74c253e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ATM890601040.