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 0xe2048bc62004d01854b0690cffeba392337e6f444988bd628056c386260fdbb6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14e4113f-3f46-4a6d-a171-d993ea1c9208.json and https://artists.proofprofile.net/proofs/artist/14e4113f-3f46-4a6d-a171-d993ea1c9208.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 0x2a909f7e94595faaf7851aa78b6f79aae59c864909b20ab55b2a3d6eb14014ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKA412300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b636ab03a1f4ee78dd730bed305c54cef9ecaeae6aa797b707573e40b4c920. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKA412300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce14b42a5bb7dc94e1c23a0bc6a1453bcc3a0817593f3f9e1fab5e38fd482534. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640f5a10d95ab7f5e1906cb7c8df37225578d90483d60573a2b5d86f8d7e5f6a. 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/CNZ632300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f2a0ad53f324277ec8508ce421e1ae68350d5b5d8abf376d57e3d952a679da. 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/CNZ632300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f8e14b78baa1545e0bc1bf7e090d18c46434640d81846f3c415e2d979454e1. 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/CNZ632300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4a5db0a2a11595980466c5e41a308c7317f16e06e36b09c00783768210f93. 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/CNZ632300746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784fb7b1d495c8926c000aec151b3dd4a1cb7919580bf79b3fae278ded3974c2. 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/CNZ632300742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f137d0920087ecd38cdf1e50dc1f72985a8838a1c625cf2e82636731150f16. 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/CNZ632300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99569afd83bca6470770c1dc2c9e69c6f1883e8667da1531ae27f3236762902. 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/CNZ632300695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4729f05e584f7e1ac8f2e5d9f2e5d1b7aa82046879969558ff2e9164a8c564. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ632300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b408877c9a8c23c24aad44f4eefd5975025985e2532c47c71104f34c78e986. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ632300914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a909f7e94595faaf7851aa78b6f79aae59c864909b20ab55b2a3d6eb14014ce. 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/HKA412300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f137d0920087ecd38cdf1e50dc1f72985a8838a1c625cf2e82636731150f16. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CNZ632300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f2a0ad53f324277ec8508ce421e1ae68350d5b5d8abf376d57e3d952a679da. 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/CNZ632300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640f5a10d95ab7f5e1906cb7c8df37225578d90483d60573a2b5d86f8d7e5f6a. 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/CNZ632300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce14b42a5bb7dc94e1c23a0bc6a1453bcc3a0817593f3f9e1fab5e38fd482534. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ632300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b636ab03a1f4ee78dd730bed305c54cef9ecaeae6aa797b707573e40b4c920. 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/HKA412300016.