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 0x938963e95c6ef4183de4beb4b89ebcecd43ef1a7fe60796765733694bddd48c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3716cec8-2ead-4659-a0d7-499f92d6456b.json and https://artists.proofprofile.net/proofs/artist/3716cec8-2ead-4659-a0d7-499f92d6456b.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 0x430e9153a77722d5d6805117036e1236b7c8fe0b0f898a4f1213a8c28386355d. 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/QZTB92291427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32c2e2858c48ee0788a616afd1ff6ac25a69288a376d73a011cefaab8b6145a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72321577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830fb6eb26256f29baee8d7d9b239561ede987717e143fc7274a7a93f5b68844. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN82340811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe85851e1695a2a7c7c606c087a38ca5fb8bf12692c0890d0d5a8abd26fe3d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAX2382195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5127455b7120e1945d064018242245bc5577a07c7bfd5c4fef6360c73d827d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA5KR2440944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ef9b520b48d2d711821539945e8b3c13471b4b09d92967de1bf030ed4638d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2440945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de3af6f2f884fd897f50d62b8988819fa56e12bfc9374e021a5e878c0293fc3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/CA5KR2440946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e1c5d5ee13d8e8f20612a3f773f28eb3d98686fa4f83b1d937ef186268d0a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62470176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf447c83987aa32b7be256b93d1b5213899530030eda820267a74d200a73caf62. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62470177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e89644947cc6342fbf1045a12d91459cf690598fa10377dfdf5d0a5e509a00f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM6MZ2514198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfc23b5d460be2f6d8a6db87503c8e2412c56df73a38582d2781d678e0e298f. 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/QM6MZ2532702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514cca9732a8589c4e39f394efa45e19357c9f14e448e19b64d5b38af145db26. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6MZ2532703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8781ea4f30d57edba9ff183280e073856adec064859433d686cc80a2a63ac779. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CA5KR2530924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b3ee4182566a182d4fc5c4c59d0c688a64faa1bbe330cfb84d083f3ae0d380. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2530925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b2d30b7cde3c3bd2df20041fc69eebbe8b1e52fad36669dfb84751c613c4af. 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/CA5KR2530926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610167f6c3afb522f6950e0592bf7a105740554f0cd093a3b41e5c9766d21486. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3DF2598750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8a07f4c16e3cd0900152f13335e032e1306353f49bb327d78e12966e8f3f68. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2598749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e44ca0d1d282675640a3390d82a67663afd4496434aed6ee15b36498edb08c9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3DF2598748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e69061c62ce81dfbe6e2fbcc96f9dccca3edb03c81f069a29f492589d2db498. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/GB8KE2521244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88c829c593ab5911c58bd0b09a1631e764add7b0246eae8af1347736c77f5a7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ROUM72500320.