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 0xb8f1bd32eb9a9fe8acff590948bb62d65e5536c437a1694303fe0390d687bc52. 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/970371d9-6fb0-4e31-9c31-18d83fe20a4a.json and https://artists.proofprofile.net/proofs/artist/970371d9-6fb0-4e31-9c31-18d83fe20a4a.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 0x560b2bd92d7cfa7854f1e2bfb46be6313a6375a95df5c513f857c3fe4cadac37. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAENV2505885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dbb73dfe2adc2b91316b676193353c2300773367ef56033a29fc6be118451e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:19Z), 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/CAENV2505886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946b69a73180873149389a9d3aa70bec955b75cbc5bb9f0607292623530876e6. 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/CAENV2505887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87508c0e554d11c0c324e37792c45d147b2b54d5389e6e63416360d454520ef. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CAENV2505888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ded8c60809ff8d4a7cd6ceb3d818b6906236cad8019e439334c9639143ca3. 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/CAENV2505889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb0f829dbc98e317a380008f60ac496c45b379c61f492af05f7734d9e599ba. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CAENV2505890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb37fdf0ec1b10206065e000fc66cdb06a95405168cf15d5470479aaf7fa5c6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:40Z), 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/CALVP2505064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b921503bcfbead1c9c2214c02de31fbfc73c0cb896f350631712c24f9c8d400. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CALVP2505065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd949824dbb10860830be9df403608e8f0719db49596999df4cf8ea1868177aeb. 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/CALVP2505066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036e6ac4999e77fcdde96f138305e494ba17839743897313bc1dee129bae8fc3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CALVP2505067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49486a9674e94d618c41379c1e4c3874f2f9ac8e815dd3edd902b079156ee8b9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CALVP2505069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b3bf987f33dec7f79da8dbfa2bdb2f1a99a0361539d29bcc7f1b49a17b3c6f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/CALVP2505071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19983373ad0381bef94064b42d307993d3fbf0f845564b04b6a476b16638b205. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CALVP2505073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94384ca8e82df391b8462a463eb0e15e78444b26727f48b0903b6b2e673180. 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/CALVP2505074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8c109458063f3f9a4b4a56e351a43a74be06c41b4e923aba6e80ca334d7d7a. 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/CALVP2500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a9247e61911ad80c605aae4626de398e3c20b7bf97d5d5c5face03509b97f0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:01Z), 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/CALVP2505075.