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 0xc5bfd08b671e63f7611650cae637c22846c71cc1d16053fc65b91fe3ed98b397. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4216c9d-da7e-4751-a415-0f3c906b251a.json and https://artists.proofprofile.net/proofs/artist/d4216c9d-da7e-4751-a415-0f3c906b251a.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 0x13e5e15a6958088e7c8006078e5f13617a55992efb760e8ef928295aff7cf7d5. 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/QMFME2344976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301370bedab1ec3ff29adc29bc5e203bc87eee685fbd61df5bd4ef7575232670. 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/QMFME2306207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994a5fdb7c6977dacd86f225936539e566dbe252754cd6cd1ca324793047743d. 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/QM7282391302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f906452eb2d611da852591f645a8f203e736fe786eaa6b30e83ed046b52720. 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/TCAIO2409224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8f086f64a51262250d75e5222d3996d0135bb78ff7073b3bf0a3d888f6d48. 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/TCAIO2409287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489394989993692355be6ba0f49f7f9053dd5d3ab6154e720a6cbc5752afff22. 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/TCAIO2409308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22574bab4d6277494cbac325776cd592392a9e684c7452cabbc8f3d6a86fd18b. 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/TCAIP2409335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6bc96800241132546200f24699f42cd43d4be0f6c443580efb6c369760220d. 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/TCAIO2409358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd084133782473711594f7bb38d16eaccd9027da6d0f2e04fc670fe6c698f89d7. 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/TCAIO2409483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342ffdeeb3c90394347f993c0f9f335119281e38d4f86dc7f0005543f162f47. 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/TCAIP2409499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88051d33309b21938c0f8efc54eb1d7c2937b133abb91a6e5b7a1f0506f3d949. 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/TCAJA2430045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04147086f213138fb37bf8d0fe73da9428cfcb1ec39f8ff50dee1e348c08418. 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/TCAIX2469435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a079c2addddf0d758721dece720ed2f32a7ae2ace22eeddd940edac996e26b. 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/CA5KR2464227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a718e52ec61cbf653beb4996ca00dd75e961a95a0459980519f0d252f61ba. 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/CA5KR2464228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9943481e0c3a453458639c8a310fc7cb028eaf536b74ad6569976dddde15a84f. 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/CA5KR2464229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b38b7ca3c29cbea0d3aec572f861acd8175e85d518882384eab13865a96388. 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/CA5KR2464230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe042411314de934b85e333d16517fa861c5f694b7d13da3ceacfdef9b21dca98. 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/CA5KR2464231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dea2b185ca40325612e0ed939c037412f8dffd2aa7d9ece70a4af7ced187e8c. 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/CA5KR2464232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484e9477df0d7dd9d9013a6f2bf0eea4cba1a1b1ffc35799f591d1701b4bdc3. 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/CA5KR2464233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174e4f81809bc2a24c977ceb31056fe4deeda55f8ca9643a55665df445077a22. 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/FRX762431107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e397b6992e8ac38727d21de1793be1d57a97ac962d519ddf17beb2ac990e7. 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/FRX762431108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfec4e47093475fbc9a7815b3d96054ef45d3093068c801ab278635ec4dc706. 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/USCGJ2484589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a107b8b6587c7241293c17172094601d14a873b15050934ad3c6e51654531d1. 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/USCGJ2304287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e9894ec278b92981888cb499d9c13bd01fe3c619c7ab51ad5914ce758e64de. 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/FR96X2487217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21369ba5915956e33e311f16189af22cda87b2e230acbbf4fb1653e0c81cf4. 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/FR96X2487218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa854af3d860e8b6c175da33354dca46d50dbdb3da9a508f6bbe9c331650b9f69. 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/FR96X2416938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9c7a8dca11287d8bd176c146c8ed884249318db3f3cd020c4d13d697a1b85. 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/USCGH2431004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5cdf543f057e6cd4d0485e3f55a992577e73a58322d5c13c8e088fa7b626af. 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/USL4R2352966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2d34098b513a33b0469df8cb813a8bd7ff5dcc9369b4aa852e303d0da250b. 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/USHM82391770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5823546b9dcb898566423bb98837ebb0ff98e51b1424558934d31a5ed4a8cd3b. 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/TCAHE2397019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f377e6315cad1c4c179b638dfef91483794357d9a8e6e0becdf0716924354e. 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/TCAJH2525172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9fcc105573ad2961963907c4f82d86584bfc87289f4792db2b461a7adf963a. 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/TCAJH2525207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e525ac83bd4657d0089201ce26008b124a84ce1d4f5e6cf3dc7a5f7f50094d. 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/TCAJH2525261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeae603ae9839c6414ae163556dc3477cf47339c0e147737ef4d18ae672ea8a. 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/TCAJH2525306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f211617b3672393c9a92eabd4893ad06b64ac9e9983f04f668ecd8ccca19f. 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/TCAJH2525400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36e67851e05c5c4be29dad3fa64d2a82472905bc1b72fe77f24a599e1e0fb64. 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/TCAJH2525428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b19a5af1a436d4f1be63f2dba3b75c20ec4b091dafac9cf26fa5253d900b117. 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/TCAJH2525452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05670fc4ac43b0cc59ca168191e5cb1c8f66489802a37527cab323703d059dba. 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/TCAJH2525472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d001ccff8f735f7ac6ea560e4ec92cc4660f272d92bbf78fb10a54ea5e56f. 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/TCAJH2525498.