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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb117190cbb99d990b63d2c7d2351823fb3737580ec88ceea002cb66eb519b. 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/a3f26887-c5ad-46dc-b176-2e539660cbc5.json and https://artists.proofprofile.net/proofs/artist/a3f26887-c5ad-46dc-b176-2e539660cbc5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fded15d6714ad8f9c127d5add7eb7bff8190073d1bebd48a3b9d3dc9f9ac0f3. 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/PLI292100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fded15d6714ad8f9c127d5add7eb7bff8190073d1bebd48a3b9d3dc9f9ac0f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI292100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201c9ea71eb76ba522ed5bdbea5efa25cc5ffbf59488e6cd0f866ff3f328246. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLF241401372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f379596a71aca6b5927d98d05ea1d6ef7ffa901850ae9b4c6d4d323b92565. 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/PLI292200664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9832a8dac4dd491302f0f36626c1daaffac47ebe033e7df8d8ed018406ae54. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLUM72201064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334fc5abaa100e0fd492693376c65f571f86bacee29ac849a02cf9b008ce3df3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce21404f7d1df49877bf3065a03b1a1db68c222985ffb037c26e37af4aa5978d. 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/PLA460601610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc70cbfab09621bcecc40933d567982221f773dab40ac667754f9bf9179a499d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLA380609202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ab06733a8cae428307aec51b02b27ffa014a33de1aa5b5ea45a59c7f937555. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLF242413357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2b0684fad1270a48db7af6ed3e1e755214e528dc61628d0f9223ef816abda3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLA550700502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639320c5828fc6a9e066ca77c22e917da6f2d40dbc45bd629fd12922ec6e550. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLA380200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba9db825cc75ab0357d30f4987fbbebe6241ee26927a1913984a78d3380da87. 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/PLA380200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99498c5e4865d805c2b06fd55cc58029b01599ac5471b0fcec32c1a1e2e0ed0b. 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/PLD962400000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64fca98c530ca49be832d7e6e0881baade7d1ff8dec95c67ba65a5a2428f52f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:17Z), 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/PLE951500070.