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 0xbbef74babfc67dfff6a8c175ff3acf74106db2263a61778dca3548bf51e051f9. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd398cfa-6a1c-4eb9-a0c0-71300d49c777.json and https://artists.proofprofile.net/proofs/artist/bd398cfa-6a1c-4eb9-a0c0-71300d49c777.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 0xeee98d759d1d3d413ed5f55b960c6d9ae97fb02fbf87642f1685627f0a70bc20. 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/PLS102221076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa88cad9f78d594e04286a945e240e3c116a2949b5846bde1617c55ba89f4c0. 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/PLS102221077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e5f78b01032b4a3fc4871fca5b7294e06df20174c3c60e681abc3f9da9426. 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/PLS102221078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f497f6dc4c864df9a97d21a4160e4ec72c4b2a513fb02072a727ae3b819781. 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/PLS102221080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee98d759d1d3d413ed5f55b960c6d9ae97fb02fbf87642f1685627f0a70bc20. 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/PLS102221076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa88cad9f78d594e04286a945e240e3c116a2949b5846bde1617c55ba89f4c0. 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/PLS102221077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e5f78b01032b4a3fc4871fca5b7294e06df20174c3c60e681abc3f9da9426. 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/PLS102221078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f88caa86754c7307a5fc78928732c6c09ecad0b401c1e81592a292a2e925e. 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/PLS102221079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3749f53cf3ccd87f8740767e24e964d2c354b37e00a366b05a41e3254ffae2b7. 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/PLS102221096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d578bd95185d7ebe8d1d9cf0cf26a1234d57a10dfe762b9a4efc44274a6ce6. 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/PLS102221097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ea5bc83ea7902cf6ad6cea5e99ee7f969927f3a6dbdebe843013060cd6d183. 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/PLS102221098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6155cdc3d563832c3ed000d49f27a3d9409240baa5eee33adc83fb6aeee9b7. 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/PLS102221099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d4583062e243e3f16b32e0bc5b0ee2b9bdfb71fd2c26ae9f78ce5c5f3c1b4. 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/PLS102221100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13078094027b33fc30d201580f868acb10e76ccced74b2417a7f5cc30250d6c. 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/PLS102221026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417a72e84d9a3689b466d2f0f0614231db1acaf0a16f6fd3dea7b2aea0fcc7b. 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/PLS102221027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af66b096cab6680885bf2f1e11f33616e49c67d3cf64f8a953afd901dca3596. 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/PLS102221028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9242c827452c2799631edb26dde450b1fbf50c04d8b9310535c3ce496fb3314e. 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/PLS102221029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0efd8d1b67224cdb4b67b04d784c14abd6dc32331b4bb3b6ba4ff06e554ed. 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/PLS102221030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245e6dee0a739defb44c654e6494c87dee14edaa091e570ec43c97f36968e8db. 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/PLS102221006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bdce7126d48e96ccf123ae43313fbb8c1db68086eba06d8852b6a22aaea31. 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/PLS102221007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6999f59d23e208c3cd55311a1129769f353826c5155c85229b7a864f63ba154e. 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/PLS102221009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391608b62f9b3c68260ca9d2861d89952cf7784ec458729685b7a6a1ee681eb. 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/PLS102221010.