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 0xfa5572e45fb17a46ea8753174efb33ecde173a669ea69f0ee96b56733c2f8e5b. 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/f5f73974-ccba-410e-82cc-b5e020648db6.json and https://artists.proofprofile.net/proofs/artist/f5f73974-ccba-410e-82cc-b5e020648db6.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 0xef01ffda8848346e8b0e8474256d6a6372a283f8ebad123f4361597693ea8fc2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:41Z), 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/NLD980900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb793ecca5f4dc111880092141618a072a1b7cb709da51da1b41dd16bcb1f4869. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:39:29Z), 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/NLD980900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85da0253a7dd882f4ecc0b4ff7ee6d5e21aa7e17ce2de6fa5d6f9ed22ca2bc6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLD980900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2410e5b6ecdebfc0760d45b387b69e7ea7bfdbad348a6cf203242a52d01cf55. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NLD981100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1f59b0f1ed18ddca9cb3c45c23aa24eafbd8210252bbe85689d7d252e8e027. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/NLD981100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2410e5b6ecdebfc0760d45b387b69e7ea7bfdbad348a6cf203242a52d01cf55. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLD981100075.
Koekoek - The Ultimate Carnavals Partymix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0320d3b5a336a5849213d74ab2b28184876820f9982c79f247cfc541209e5cba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLE871443302.
Dubbeldik Feest In De Tent + Alle Toeters & Bellen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b453f9d8c001dba44287964f74258010df8731d0b2732b95d0bd56300a95bb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:30:56Z), 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/NLE871533601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909f3feabdd5b4522d9b2ae6286c91674aa21c58f07d9cb61902792e07ebeae9. 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/NLE871538901.
's Nachts als niemand 't ziet - Carnavals Remix
`s Nachts als niemand `t ziet - Carnavals Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b961b99e7cfba7ecf086bdbd7154514caa3fba8763becf530f59d764bd84283. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/NLM1G1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3fc4054852898cbd0254e3251246d40d18ed9801c2018ab342fd14c2bcda7b. 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/NLM1G1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a591347016fd62d28d3dc37ffc049f59add938434c240201ad01e6850d725. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLM1G1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa761f1a7157437874d50dfb8abd49f81876f59a13df4b3c52921caed8af7179d. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/NLM1G1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab548c8c0aaa633b478764be77ec7f1f9eb4afbc07c32bf85eee6db5c6b4badb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NLM1G2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d1ea9712d8b77fec045fdd96f12427f68a91901d85f30290c66370e2fd319f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLM1G2300026.