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 0x8284f0e16e667d093af104a7f081c89295c7b4edb9f66784e1d80d50c2472d42. 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/fc1f6f4c-02c2-430a-b11e-809f57e59933.json and https://artists.proofprofile.net/proofs/artist/fc1f6f4c-02c2-430a-b11e-809f57e59933.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 0x43d657ed4584ba8397a361e5e1899dfb319cdbd7994a33a0709bbffd4439f07a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBDLP0600301.
Freerange Records Colour Series: Red 03 Sampler
Shur-I-Kan - Selected Singles And Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e5235032e06a175ccbde32bfb2036c509a97e28fe22b40d1c435be9acd25cf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEY470915473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c18a70155667f24f8f778d94129db120cf27d9ee9c1fac6fc0272883b9fbbd. 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/DEY470915474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1410171c0c005d6ecd5af3b5b1fde00b23b57005e47bf1b9b518db8c1583451f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEY470915475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142cd1bf047ed4f04a758d52b0c3a4f7b2bcb83dca7a7c22746feabdd22081c3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USC7L1407302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7958ff29a5be828133012ab5267198610959fd2faddee9a33c66d459e586adc8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMQ642078002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246657d30ae827a20e4d3b4ccca64771a6a203e9b65c2c3dc9c60f0b8116d7ed. 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/GBDLP2101189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b98c853dc771c882cbaca9615a14239c8815a5ce91d5e445a287bb3354a8f7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEY472275202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813db2a12e3ad10e6384badf7603606d3567b3d3ced50ad6ac2284aa22b4e841. 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/DEY472573337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe339ea5bc8e96d60f2c507be0fe74871bf8ff68863cb786c2fcfdc19fe6f6cb2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEY472573338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b23dab1f426c6fec5c2c67d92474ae265fc64373acf0eb28fb1450d7275b20. 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/GBPKF1300079.
Café del Mar Chillhouse Mix XIII (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4bcc4448af2b95f10ab86f793429034fce6080a5637ee9f1573a373bc6b05. 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/GBDLP2101190.
Papa Records & Reel People Music Present: Messages, Vol. 10 (Compiled by DJ Fudge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b23dab1f426c6fec5c2c67d92474ae265fc64373acf0eb28fb1450d7275b20. 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/GBPKF1300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa279826af18fe7210aef11b1946618b21689807d29c8eacfcfaff5bde45ba58f. 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/GBEWA1400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab5a5ec8c45bac6117ea07d7e49cfa17db306dd789f5bc2aed1a2a690987be5. 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/GB7GV2290020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcd5cadbd820d77fc126a04b5277decb3b63e4e5328cfa1c4cb47b99b3966d1. 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/GB7GV2290021.