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 0x3688c5e341657bbfdc0b6226e4c4bab3027af20db312e79173e3ae4b2f1770ba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f80b7915-8866-49f3-b2ca-a82ed887ed69.json and https://artists.proofprofile.net/proofs/artist/f80b7915-8866-49f3-b2ca-a82ed887ed69.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 0xdb270658a09788f29ebaa65f786a16c5ada620cb585a4b44a3ebe5a9e99896b3. 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/QM3DF2171777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb629b66fa29aa0717ce7417add8b986461fc6166126182af71d0be6e6b4dae. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:06Z), 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/QM3DF2124740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6f7fb9062fb1d95f1567b8366f6cf3f9b03e8f7d59416b1559815d7872b390. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:54Z), 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/FRX762326916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af977cd10596d711440352522faa5f69e8a43ab5d76b469ab01d7f315e84c34. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DGA0R2303508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd204991537649016e105add816d6eae32268ce5e7ce2a6a13d752d820a2e94cf. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DGA0R2303514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f48c5eceec58f46ab6cc1a3480a1fcdd7167366a887fdf687dcb06586e52b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0R2303515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7a6f1f505a7c08f6c29614a96d04be73100e7d9e893dd14bce8f105843aa42. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA0R2303516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cd9ce7ba01c386dd8c8d3bdcf551daea4cd190a59dcf75ca8e034aad1e2c4e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA052445847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55cb97ad48a5e3568b56d1326b1d50cb5e967c148b2b93de6deb1913c3ffa97. 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/DGA0S2402779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcbd694e52ec716445ad419b7cdb375438fdcf5192e5bd3eaef33b8fa0af4d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0S2402769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d19018978dbf919b8613191c6a1d97f1d801d6b4ce5e1ddfd3d995ce68f3c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR10S2540549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc426c6f173657b3a6b7974650331a79facf84a048f38fba18024716a975b07. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2549737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ec161d6187399f7774042cc2dde016518f03ebe30ce7796e9f2ca97379f62c. 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/FR2X42592803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482f7f827d7c71fdba78ae8a8858151be8a29be00c92f757e634940111f8c1a2. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR2X42592806.