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 0x665f7a37e5683e82b2a85397eb2fc5686ba48836d668b353f01bfffa0508fe7e. 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/6a9116ba-eb83-42bc-818a-12542a4c50f0.json and https://artists.proofprofile.net/proofs/artist/6a9116ba-eb83-42bc-818a-12542a4c50f0.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 0x5fa35542be885311f6f4fcb5479ea564cef3aea2f4a6448ea032d0b767459b52. 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/TCAFK2196794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003add36eabf4a01c3e2f7d9889b126c31fa5fe6f4c15fe03194e925f454d0f8. 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/TCAFK2196885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77588c114bda19050ce75744d31d4068135c51c5ecbd462d2ae0b24851e6a5f. 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/TCAFK2196895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc999802530b181ef39f55ee67e958bf23f3036bff918c773e91f2ec13ac41a53. 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/TCAFK2196925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b0f82517b89690a0a419a000ebabbe44c56749d1e4533460c50848f52f4fb. 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/TCAFK2196941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361b4ce6f1a1ebe4d13e99afa9b6c7e7faa10c4180138c1f0c54ed3cf5e9f122. 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/TCAFK2196946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475432aa6afb8bbaf354bb5cec933aa7b4f93e8210311e82adc626a372d0336c. 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/TCAFK2196953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37f7fc8cbedd9985bde4154886769ec110127d27041ae2e747f96578171666a. 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/TCAFK2196988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d00a3dc82db20a1c0ea709b9bfc0ca851f0b580834a9a236cc444532c817e. 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/TCAFK2196997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1047760ddd3d3ed9ae9f28badc2583b27bc060f1687f5f85a230c0cd611541. 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/TCAFK2197024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6439ea1c1b6488f0ffad6eebbe00ae80c3ad8b31934a19d97cc8fbb671ba0c5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:51Z), 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/FR6V81037574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaff467668fd097d80a18b87b807d8dc58aa9aa76cb8544b3c668a2317f78b1. 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/FR6V81037579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb34b1e9a8710b1446f108cfd3c1765bb5f5f862d999fd464efd4db9e7ec8bf6. 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/TCAHO2359363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7cf6125a902e0c90e1de1466ef0dfa0be79de3a72b4c6ad0ce99a6acfd5609. 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/TCAHK2383569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e09fe53cb58324e695ce3722dfd08057045f7e00394df56adaee0bf81573e. 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/QZK6H2348134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45491961b8c4857abace116f19103efc145c6950199475f05bf9df3aadb7b2ae. 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/QZHN92355071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3030b93b29e39bc8b0e7eb0e8450ede596fb39efbd15b9c808490508307de404. 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/QZDA72322070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6794f00b3701391a710f8a7133f35fb368a0ce4628e817fedce0806504f33a. 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/QZTB72219741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a69c34989903ae25844efe23957837b6fa447fdd2e46b603a59bd08c474cb0. 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/QZTB42292677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cbf0b27dfb8a87f2e603f42f7ce940f69597fcff77f138256d3bd0072ba674. 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/TCAGQ2275206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cc3100ff8f16aebfb49a3dfda570d3074375d02e50fa4f3633fc4ab275e21b. 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/ITFZY2100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca74d8164bad9540465986040fd3b5d2747b66a076a2e28997c6dfbda13b8a8. 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/QZPLS2153246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7079548c916621a8f33038172ffad2e437c95dca1b05c6593da5cabc2ff1440f. 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/QZHN32113040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8029d16697de13f3544b62cdc0986398ba5ef70dfed2432fa601ac114dde386. 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/QZDA82147274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dbda68de1d29bd7d5e7178038f7ce2f17379b15157374f7161111a46c52d19. 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/TCAFK2168334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374401e5812c00511f5bfe7627347a781864ceaa529132373e8320c5cbcf6ea1. 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/QZDA62090987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441d79c3b0cea1e800870347e9a84f51c0a7b38c1bcb26ab2224288fe66e8608. 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/QZFZ42039665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f332ed2c26121b58cce1fec11f76d2f5e1a93bf0bc39e176b153b063557f3. 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/QZDA41991217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1cf97e8f6d8a6c675df85e742b0764705fd2390dbd129ac0ee5585e194317. 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/USASN1600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42f21040125bb9f273d7308d86f89b4e8fb7d4d0e3543c01646388caca65892. 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/USASN1600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c2aaa0c575c0141fe07a42a49ced4fcc8390bbc837ed264a5aeedfe9e333f9. 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/ES50A1500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc0c34ee5440e5c9b1bf00e1fa07d242265d69cff8bf1295b4d14314cce36df. 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/TCAJJ2548353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3eb5def42603e3aa1872be4484ccf942077fdf8214ef24c5676b769abe1b44. 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/TCAEW2091191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97a894d48390005ec2751328aca522a46cbf403c6d507b3a4fbbc8e633864d3. 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/TCAEW2091208.