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 0x4334300506876dc649aa7bb879cee5ccdbe651f2ee5158b2ee43cb43609e6e00. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f551d2d-6c8a-42cb-a468-891a858b02c1.json and https://artists.proofprofile.net/proofs/artist/9f551d2d-6c8a-42cb-a468-891a858b02c1.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 0x5847d45ea00c57c83caf6c4c29e92cda94a8c4437c28a5435edd60aa4406eed7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SEYOK1957345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876acce583f33cd3dcdeb59a50015fd648ab2a1bb374dc248b02ab98bb4af886. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/SEYOK1957346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da0e460e2e5656d1257798beb8bb60e64e48235c5b405fdb59b0dbfec21dc69. 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/SEYOK1957347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528d900dde3421d0224ff77321cd8a734f3e54523f263443327613030c8c7d0a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/SEYOK1957348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab51d566a3b1df9d61a9d8a49a3ad8953e9acc9ceaece16b8a3d3dfd0f7548d. 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/SEYOK1957349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1568da1f33099b6e405fe500d98f00768967b255e9112fe40b7c79b1ee77f. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/SEYOK1957350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3e5b9dcedf0cb1eca0ce28088a62b00d3aab71b762e08f4d4bcd80d0ee32b. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/SEYOK1957351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c1ca491b7c03058839f5f4d82ad9f5c3fcec73f91d78aba8ac02dec62b9d4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEYOK1957352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ce09d0180e809c4da7d21e9037ab8fa036f29a61a571076b46dbe7de2d354e. 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/SEYOK1957353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afc8853b1a8fc2a416a4475bc956a6cb78ee5f13c25d2b37efbb63497f2987e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/SEYOK1957354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e651fa84ea0703d11f7dc8030098d79b98b6b9b449a995bdea2c544ffe436. 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/SEYOK1957355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77726df17b0a8ca92e12efdb38bcffeba4a579e98639964ad0c309f0538a185c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SEYOK1957356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978cf66cfabf94ab249de1e079fb1cbaeb9405eaf093cd1458702b7f31980157. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/SEYOK1957357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458a865d4fe9033a7410f75a15ec17066ead6e89b9d309c317a6418d7bd6731. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SEYOK1957358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d48bed0b9adebadb9084f67c4ba11ecdb6fc927dc1420d7bad200f142295ae. 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/SEYOK1957359.
Digmaan kontra droga (In the Name of Drugs war)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4cebcbd6347b342b908c510a53950965d3f766efb2cc114eed2dc198398e3b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEYOK1957360.