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 0x9d06aad247b4eabe1dbc39756fec95fff00b6dbc5c4c9d184882a5dc2afd2d90. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3928ca6-1693-49c9-8da9-fc5e7577bdc8.json and https://artists.proofprofile.net/proofs/artist/a3928ca6-1693-49c9-8da9-fc5e7577bdc8.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 0xcc78ecec22d2104641b3eb183e08cc1d5dee84c6a82e66fea0bcd10dcab74d87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6W60900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a63cc1f516faab45d78f54c15dbc91a7005414e6950531acc9102a434417cf. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR6W60900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2703c81ba3b6c7769d339637487a32627669daac71542c6bad7828330b2abf29. 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/FR6W60900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76da7b540c6f6786b938d4023330061ef3e5cc1e8738fea9e2e0f534e45d1f06. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR6W60900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b532d9be3626f25854a762ab160aa6e2ba5effc7f7eabfb228ed6afacf29e55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6W60900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430b9282c0ee39327f08d478e478e11159af899b3b127b4a49b94d06182b386d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6W60900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7978e02cc129b78216b7d01ab3e9f03594d22fb0302f5cc76c4c16533304b8. 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/FR6W60900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475f5828709697fed98da46a948cbc771d049c94b04dcee08317464035e51dd0. 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/FR6W60900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464ebcd23cdc6556f52b8847e873783dd2a2e18d3b6ca3fe3d37c72fc8f227bd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR6W60900030.
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 0x63934821613bb379ad7ce0519441ef7b2bc8de277040902bd79c4673045c5053. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6W60900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fa36d8f519140172772ca157c2e689e9704e4edd90b67d9d7e70072d81c0a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR6W60900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7059b69e9b24cdd35e638f3e2e32782067bcd09a720b6460167cee2a7138c02. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6W60900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e08558ca198617e886eb28e6c9f7293fb90b42428fbb34d9861a6c378a945c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6W60700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb23b0c1f56ff302b01ef74d390fc60bf80ab4ece2ac29017abe464e7bb1a09e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6W60700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbcdefb49e0e1c21251f83236a4d20f4b16d6423b638d9020bc935ffae9b843. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6W60700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741db6721cbd13ae373ba3f280b16fe304399adfe4cf439d22314bf3a2ae377a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR6W60700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aa6718143d34b9a260e4adaa58ccb599dafdb1511a37048f63b5bb3be3c0b9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR6W60700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd1331ab6cd9dc222b5c2770d5856246e1fb3149925a5d8ccce96aedec4ffa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR6W60700007.
Charles & Joe (Gianluca Renzi All Stars Orchestra Plays The Music Of Charles Mingus And Joe Henderson)
Further to Fly (Sings Simon & Gurfunkel)