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 0xfa34024735a048dc564f910170b3b8f06652d51434eb627e9d2933a7179646ed. 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/ca3437f3-4ad0-4e16-b532-b7fe42fd28b8.json and https://artists.proofprofile.net/proofs/artist/ca3437f3-4ad0-4e16-b532-b7fe42fd28b8.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 0xd5f958935b6d9ef5d5603b55a8ce46efddcfc4efd5fc6fbe549c3d0f23c9dd44. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USTE10337503.
Early George Shearing It's Easy To Remember
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e5b3d73a85fc686e19a081fb60b613a88296e8334206a3053e4dd49b371f86. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEPI81302879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02558b35ea201d6a1995bc17e5f8d21ca5a4aeb4cd94cd83a7420d4ccca50eb8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEPI81302880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abcf178ac3f4cf4fa524ee7a204cab5466d4feb53bd41309f2901192013dafc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI81302882.
Essential Classics, Vol. 901: George Shearing Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ec01666e110bc55b4e5275cae2d7621f3f946f44b3179d9a9244fc62651369. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USTE10337506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930776056c5241bdb7dc1fa5020b70e5e9eb3a24011663886c641c71159b7299. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USTE10337513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac03678edc2d4036969a1d3a63e7dff3020420fae4a7ee12b619928ae95a68b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USTE10337512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b21b891ad2d0b6e04813f7860500417962cbdc3e089846f0ed2e6afa857701f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USTE10337511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7e358e741c9830b3e7e39029850abe8e12fb496e59acf077ca5f9efed5e26b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USTE10337504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf883a4275e7ea04d39eda177135bc125689b2a966209ccc69fe0188be688718. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTE10337502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b89c1229e23921c520980eab27bf731c30c9451ab8b1c7fdc1f6dbd296aa74e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USTE10337514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb191ca5bc65515d6e3f2c69995a6b747aaa8b97adc2ba8b6a05eefc55a9af63f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTE10337501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f958935b6d9ef5d5603b55a8ce46efddcfc4efd5fc6fbe549c3d0f23c9dd44. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USTE10337503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697e26271127aeb0607824774ddc722b60960064cc5c2c79cc34b6f89c021a70. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USTE10337508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4166e2fe42831fbeb051b04e271c361ccec1a1d7d6542281c234bb981de3772d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTE10337509.