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 0x6ab0ca7725334c25555708425392800c7653c7932b3e6c2a09d8abf1d411c1ac. 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/f5f251c3-2f6e-4611-bc13-dfe696a51d1e.json and https://artists.proofprofile.net/proofs/artist/f5f251c3-2f6e-4611-bc13-dfe696a51d1e.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 0x6509a6f787fb53fec87090b2b1dfe814d5e078172ddbac411ce457912b27ee91. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE5Q51900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e2e57cc0c8c1afc6572a6cde16dca85231239ea14a42f0cc55ed31fcd8f1e7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:36Z), 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/SE5Q51900564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308afa1cde3b72a5d6f585bce52fb54d97310eda1c2a5cf058f3cb11dbc8fe38. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE5Q51903789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b680de95e663fdc405e629b132d85b72a8a2d7bc7df24db59bea824f10e3d76. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5Q52000612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d7bc9e2c62888bdcbde3ef63b79058b3f7163f41293084039cda3728e3ab5. 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/SE5Q52101947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa008287b2495ade6a2ddabf7a9ff6714dbd918ad47a434838fce9ae8fad3a823. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:08:13Z), 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/SE5Q52103867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e82709485b2752c83af90fec4403b0d72fe1751aedd34b94eb87c9754e4e95e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5Q52201628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e27680510a4f2294a41f5047b80a4d785158691caeb579960a53c48c01940f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/SE5Q52201518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6c428a3cbc3d4e65b3d9d2f414595ee1981527178bd252c2531a6178f12134. 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/SE5Q52202809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79ff76a7424aa6193bc25241c56d4b143e594035ba7b9c67f5113c3873600e8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5Q52403126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff9ae3aa53d63f2f3b40b6f34bcb7a8e17b9b33f2c52ac230a5bdd094bded37. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:44Z), 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/SE5Q52402960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9218f8246cac690381ccbbb3aed4c3b56e3a00158ad0991cc0292e8e5e9a20. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5Q52500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aaa6093775fc0da3c28110499531ea20ccef3066da68b5340e88fbc248ab72. 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/SE5Q52500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15afdc0c6a8fae5b827103f0127db2faabab455668b5d8f2e02a98ab14ac04e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE5Q52502096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19db842f00943aa5a88f4c0744340e18f6fe11a3fc0c3c33a127700c9e89a09b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE5Q52502296.