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 0x645549c029077600b8922d94d045350ed5fa167069937a28f3a61b8ae284a1af. 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/87ea0a88-f785-4ab4-987d-48d03f7d70f0.json and https://artists.proofprofile.net/proofs/artist/87ea0a88-f785-4ab4-987d-48d03f7d70f0.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 0xafcdc88c5c7a39578d6d08c73a73e8a94a79ba4708ef6f5b333c85851f4bfe5b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATRG92000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9aae1bc454f4dfbf2555a5c0e0b103cf517ecc4dd71abe193730dff1f6edbe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ATRG92000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9308e2f596e2ded2aca0b50d43eb9d4ee425bc6e2b7230a92503ae481aec83f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ATRG92000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a9ea1c37e213cf4394ca7df6901e77b32facaa100c54ddba3d62ca7b5f662f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ATRG92000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb1540f5092194dcae8cb6e6ab27a34f5cac1425793481fec5fc34f780953e6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATRG92000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6386d05b92fe3cdbac9d2d6245b678927c1a2da7b8855a2669c1009f24f72097. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATHM42310201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3929c9a5b00de335ea32c73d9a53ec8756de97d13888d12993b87bc2afdde81c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ATHM42310205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ae3b7aecf4143af1872748cc55e1f7824346dd6eeb27352e6f5ed7f250532. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ATHM42310204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c16dac9391e72d1b8cf21a1fe2d0d54df5fb0d94eed66e023a136c70e228b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATN262537906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bf8b3738511d0aac8db9e573f9edbf624a859d7cca9eee6a61b5684b630973. 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/ATN262537901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71af9ccfb7a9f599dd241706f66d65d4f4a82f6d7c114510247506ad13d0c72e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:09Z), 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/ATN262537902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d0e2f80f190ee4897d7ef3346f25d727a26433cf438e2fe702a16b6e3fcda8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ATN262537903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d1edb2aba974fdebffd6096a87fa136bfc6c09150f0d7e651ee8cd84640c19. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ATN262537904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace74775ec7996e0f8e61bf4413375c644ff6d1424a8ee621f57a2be7beda87c. 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/ATN262537905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c16dac9391e72d1b8cf21a1fe2d0d54df5fb0d94eed66e023a136c70e228b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATN262537906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f0ff7972e6d6940fdd404d9d2a350e53532f386cf241195081ccc47063a717. 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/ATN262537907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c783e2b9d9ff5af7aa6eefc8f2ca9ae6d4ce8f0293fde8a42aceed1e616bcf. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ATN262537908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebac30c9b7f8ba2ecd646c79522770a6665d635f11e29222b20e2717b8bd8c9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:43Z), 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/ATN262537909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0b066b992ae595b6cd1f7f947da324ef336953232f6a070abae444748a2e80. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATN262537910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0fceb9d33ca2873ab3bd87fbdf128c88fddc8b8197290877cb44686764a525. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:46:50Z), 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/ATN262537911.