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 0xbf0f3c2b10d661b5b3c70eb2d93b2ea32102c6a065c039b3ee04f477783454bf. 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/b1022d3f-ae77-4646-bbde-292d67c4c3c6.json and https://artists.proofprofile.net/proofs/artist/b1022d3f-ae77-4646-bbde-292d67c4c3c6.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 0x7b82c788d97680032745b6d360d7a7e49dc96a3197d9a964ba4d1745aef0b5aa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN71904590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359d8994d42843b97fb01a563043f35881c9f672cf814f0030d37397ca2e1c72. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR59R1466865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea0b627fa469c69d16e7b326a9ccade1a6534b9c7b89656455e73695df99376. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/FR59R1466866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1d6ec1de42d76839ce3b21a0c994e617169bca1be8cd98bfed314078a79267. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR59R1466867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca25440fbab8959d1e53dda9cb42e58dbfd1d8384fd67bb2d95fd53ed88dba8f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR59R1466868.
Kings And Queens Of Summer - Not Your Dope Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7140b11c4675ca9c642af83bd115a2dd101a6eba008df9085440f28e28f02. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USUM71708197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aca55790c9f02708a6bddf59a2f3f1da6d2f4ed4d3061b8ef822c5820cc9bd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAFK2160256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e8524f14e34bdb319ee73815df56d89eba712dd77aa7b9dfb6e1e0e2102c9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ72182181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4586e81c32ba940cff6587ce4a01d6d95baf75f5fa907d61311a08e2104ed7c. 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/TCAFK2160783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1f565c0314dafc624e7bc144392d2f31a571c41f718cd88f3e3b5e24bf8c30. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CA5KR2249072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5a37df731850e5356c509a0b3a9b6c781e9ef299cafbfde922099d270f6331. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAJE2521691.
I'd Love To Change The World - Matstubs Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcae786b1c0ea54b8f88c014d68d5c6c59eca0da9791fa654b1710a25520c81. 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/USUM71519186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1f565c0314dafc624e7bc144392d2f31a571c41f718cd88f3e3b5e24bf8c30. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CA5KR2249072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcae786b1c0ea54b8f88c014d68d5c6c59eca0da9791fa654b1710a25520c81. 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/USUM71519186.