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 0x116953249ebc4453e4cebbff061c33c253cd81a73ab020b692d147e65eeaa3cc. 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/c7ab051c-dcc0-4037-bb56-13ceaca2d001.json and https://artists.proofprofile.net/proofs/artist/c7ab051c-dcc0-4037-bb56-13ceaca2d001.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 0x442eb903fe3436b5afc51932bdb7befcda7968e2be90bfbe19f179fa70ec7d92. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCJPJ1920836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce519b4ac19f4977886017293e6bee75e4146e641548108134a280410a61dcb. 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/TCJPJ1940749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52472dc4a870d5e2c5b69df4d954b28f8474ae6badb1f20d5820ce15147eb627. 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/TCJPK2052533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31298618312b2735fdbeabe4a52612a52027b5d26bb99bc4697a0151cd5e4222. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPM2001621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8097065cca7be197cce118b18886116b5b63470aa0106a21d8cdf6e54218276. 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/TCJPM2001630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567de0b3c9e9063ac64a0133a5900433e24737492970a9dddd9f98dd54221cfa. 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/TCJPM2072544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292fae356670910b6faa24f500aadff2acf575424ac9a68f15f1484a3be3427e. 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/TCJPR2243947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59a7a3a9aea3923ca9351682bc51ab0c14701af08c6b4e5afd47e5620f7ca3c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPW2339419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a82dc058503dc883b2f829b1aeb7bc333d38c065cc7e8b78518a35c3945860. 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/TCJPW2344079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b37d3ccc25165105e75e36075ecb0de399d4a6faf5333df592494fe67ba65f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPW2344095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c3bcd893db958b5ed68a70b5ec96154945e4b5720939abce139f9656a64be. 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/TCJPX2365611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dcaf797993b7c642c3eb9c70b55c6988f98366b0f0f20646f13e93bd13b837. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPX2365613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872d31fefe009290a6327cd7c4de6d285a9837a17f978385f97140b10fefd79. 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/TCJPX2365642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac748b09ced770fc60b689ce429193f4e61d6eeb2253750d4576235ab484619. 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/TCJPY2477098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25645642384bf9b16e053c6edf1d61e51de0660863866132864de34d4dad1987. 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/TCJPY2477118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5b2acac4006cc185971eaf7224ac525cccc6e3d46cbea5ccc5efac995966a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCJPY2477134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f53aceae28bc5c3ea0ed5033ae3898346d423f0c56d65adc4e188326b68cd0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPWP02500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e853c25ae74b96086ac5b8f8187e56301d5a2ce97438566bebf2f7813f7a936. 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/TCJPA2468852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd438f2b16743011f4179da91fa1ad8e2cf3db91e6d6ed212ad29e28be881d0e9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPC2434274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f9fa10b391a3e878806bf8fb7f2ebcdc7c0b2091808173c6b88938e3502d9f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPD2405711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd157c98ae4c080756f943574aa4f7cd5160ee1b3c337af24e6f983aa4da97. 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/TCJPM2024804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbc70204b5dcc3b938d9fae9935f614d3ed1fda04d29ff5109c1b85a4c847a. 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/JPWP02200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2797f336c7909e304a5b5797a6969c08ddb72c9e9f6c04befd9f3aede2cfb253. 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/QZZ8A2479176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2797f336c7909e304a5b5797a6969c08ddb72c9e9f6c04befd9f3aede2cfb253. 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/QZZ8A2479176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9637e9c9845bfe004051b79ede1e9770dd7c18d260732efae480ee4b343a6. 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/TCJPL2027305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83c6b115d2858d3f15d49b0e8f3af17fa215cd98817ac530a935196ef0f1690. 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/TCJPJ1969683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17694ab78bda333a67a554f70c9e8cfd5510f807222145d7d08c308b28714cf. 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/TCJPI1988429.