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 0xf082e59bb49ab2452efc163b7a075961db321594c915a0099acda502e9ea6d5b. 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/6e83b1bd-9cf6-4359-a641-adb0a74866b5.json and https://artists.proofprofile.net/proofs/artist/6e83b1bd-9cf6-4359-a641-adb0a74866b5.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 0xcbd3fc342f11894bc682e9537c8d8e9045a01463fa8be85e488009a984915cd7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLCN51800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6250c5069698324a657695e1bbfc95904eca3adff47a3f3e6164665ec99911b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLCN51800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724c169a98a3c284500347c357eb0d49ec2b2a9bf6794e57202035c706b64c3e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLCN51800080.
Oranjebewaarder (Het Wordt Prachtig Net Als In 1988)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b785f3684f4b055e37f646d34c325761468139a460e55ae4f5ee8b2ceba4f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLZ292400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996e87fda744cd52c7f1074a0fbae03dd0a6f3f5ddf7c264e27dbe3ff27a0b21. 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/NLZ292500253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a59b18a2f982a3227b913808e37bbba8e3c982a341b24635151bd614b4d5a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLZ292400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b070dfd86b98a47bec46a0a844d0b1c9f9f33a273291f53d5fcf2425241ef. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLZ292400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8074ba2eccf5eb292004efc0076f52d50fd5b893f3ac9d3faa648cb468177861. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/NLZ292400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79b61f50c03c5d1bdd860fdb10d7ee4d502c2a7114d5268aad151c83e03ef33. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLZ292500317.
Van Goes Tot Purmerend - Altijd Larstig & Rob Gasd'rop en FeestDJRuud Remix
Van Goes Tot Purmerend (Altijd Larstig & Rob Gasd'rop en FeestDJRuud Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ce434575fee24969c1eb8ab7d40d4b5639edd2ac83721f8a28b619ad734b4f. 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/NLK072300359.
Hier Mag Alles Feest Medley 2024 [Marco Schuitmaker, Donnie & Jan Smit] - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb7cc9ec78e994ebf474cc5f3e4cdf668784285f653d4e403cc96d19d218c9e. 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/NLV4P2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6668c979e2192e483ca9acf9fb5a663c1973b44749627ae689edaac5478b0268. 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/NLCN52200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609f650d25556fa010b9c41e836f02ed1e78531ba89e08f354ab6704d28db782. 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/NLRZ82500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca93970f3f3823ad2fb24f7bc5f9bf667c341d64a976a523a45369c458cb758. 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/NLK072300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b12f5924c010dfa8838ca2cb6ed5423d6c8c0b15234c399f5d8244fa3407a4. 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/NLK072300314.