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 0x6f7e04d32e94bd352a8c80d23ad0385189daa82037bf9340a7c3620813025506. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d06ee530-567d-44b6-94b5-979ffcd17e98.json and https://artists.proofprofile.net/proofs/artist/d06ee530-567d-44b6-94b5-979ffcd17e98.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 0x07375d8d83617d2274baf107db4194999f7dc432f1c1ab8475eafef542bfc042. 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/ES5151101605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a2b0543c9165d15755ca2f24c84e0f89ea495312783602a05b52911abd296a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5151101603.
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 0xa625b3738d4a485d50ae189e8b064d2d2e5a3c404d467c90e4da0dcb6f1d8dc1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5151101610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7dc83dcb526429cc95d5b3be3bccc28d923f70174b24c9c8e1b0edb863e09. 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/ES71G2055949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dda094d6f83b9f65fc191b6990fb865f10c20fb28c9923488c5ad177a0dabe. 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/ES71G2055955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa37e3d90968ed0d63a872d1156261cdf9b8680de75fcec2b317bbe6190ae20c. 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/ESAAI0196270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2de859c025616e8fd3e7128a7e70d640c24f5a8b95e811e1ddb8b54a17154a. 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/ESAAI0196284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f9c479c3254830de793270a4f40da34420eb2504fcca42a17c5bf650f82bfa. 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/ESAAI0196287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7064cf4cf0be311957b80ea55b6f28f473981351e9dc4cc3bcd54b73a6d65dbc. 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/ESAAI0196288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfc438091c251708a35062d305bc13a5d8c8ab6861fffa2f2315dd130d385a. 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/ESAAI0196291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425740c5e89c6ab83c4cb480927ab3fab2cb2209a16d4288ef0d8f61e5335dfe. 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/ESAAI0196296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94cd8b8076ec606d20fe09809fd12910e930e6eec1b623ce8f713a56730e45d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ESAAI0196283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d75d1ca29c0c5099653b8849e24b939a2001e6fe4187d94f85fb504f6c88d2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ESAAI0196285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f4f7565ee3bdeb368791c0bc94f1a0c6af8ab2846e43e02e3c3e441e1c4237. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ESAAI0196294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac962fe1c760d45f9a9d4a848c1449d5f56446314d54a3d50904be206b32ede. 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/ES71G2055086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f8d608deab6d58792fea78b8dc543db6e93a9f77e0eb798f410e9851b80c4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2055088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255cc6ad285bb33ffd49208103591d7aaea363de7590c202d378923ab247bc57. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES71G2055091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb4206fd3f7d792a097aaf1e1839e53c34eb0bbe4886feeb2d1d68b87172b3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G2055104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e72987e08fb299059008ab59279154ff5e31273821fa1cb1c6950e2cf29b9. 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/ESAAI0252886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9852b28092a9070550a34e3251fdf566f712bad03cdadf54c6184c6f547414. 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/ESAAI0252887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b476a0a2f4cd2ca4aa959570b261be712759d17c07e97bf114432ef3fcf703. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESAAI0252891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813af321fe2679193bdf90be1f7610601575523e092a184b74eb21f557822455. 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/ESAAI0252893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a58b55f263205ae0a0bcde69b0d87d0f2d9438aef0aac35a442824633b4c06b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESAAI0252888.