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 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 0xed3bc051ca49a7b010f6cf698a6f5b18c59957dec7151f3a4230c0494f1de031. 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/d398c14d-15bd-41a3-a176-21f552702f3a.json and https://artists.proofprofile.net/proofs/artist/d398c14d-15bd-41a3-a176-21f552702f3a.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 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 0x8f9e3cfe4e14f72fa643f1cc8d76eedcf0ea3cfbd847a31d1f376cc5daef2cb6. 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/ES71G2337325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cdca83d20c89428c9a62ca391f575474ae243aabdf10539243d11deb3686bb. 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/BK4DA2413577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ae3d6049ef6617fd71c45d57f297d7b64bea129fe1257422470e29beeac621. 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/BK4DA2413578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dd007c3dcdf53bc3c48661428ae7980faa68c6717388a046c6ecee2c390c93. 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/BK4DA2402403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520fa3f47a0d3bafa6f9dd83d09fab36674c78d2b9288c6083bdaaebdcdeb38. 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/BK4DA2410188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cae55b2e4004728d9c734d1acd0eb7cfb6447081f6a02fdb0788d6c2e0048a. 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/BK4DA2407296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c0109961e62d4134d7a9ceecf6a22fbab0201f95c5a77405ee2fd9ac95fecb. 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/BK4DA2413580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44105ced271badbbd2f09672937547027d7970deeb0c9c74a372497ceb36d808. 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/BK4DA2413581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f01a02a6cb74ac9ec3b174140b534c83f2b7d65a598b23196fd64970eebe54. 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/BK4DA2413582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796cbf7967a49ac51247a36bd2ddd77a4f89cdd3a4f66cc9dac9a251112cca2b. 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/BK4DA2413584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520fa3f47a0d3bafa6f9dd83d09fab36674c78d2b9288c6083bdaaebdcdeb38. 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/BK4DA2410188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1059d7854918b2a25b15527fc064d7e2a33a1505dc8316507d90a77e5a11621. 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/BK4DA2323633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2388f02f62f2ce2383e93cb42b97b94249fe2ab6f5bb3f687a79bc74e02d54a3. 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/BK4DA2320873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9424f57134eaebf42718bb8546f4403172062d869de7f12ab7aac87f5e0c38. 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/QMDA72355926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26588a5c995c8942fa270270f78c2e104874d2243f564122eb33e5d1f08d4aad. 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/USA2P2337839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243b792f37aa70f55f29dbf62b31c1a00a5c3c217c2bb98e5a28167ceaecb371. 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/USA2P2326660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e3cfe4e14f72fa643f1cc8d76eedcf0ea3cfbd847a31d1f376cc5daef2cb6. 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/ES71G2337325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66d6155aed6e1fb5a0c4ee306e187e1f19271378a387b778410352b857359ff. 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/BK4DA2430259.