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 0xfa74afc6e1aa40df5d97bb3e7c662ea3496fabe1a293baf99ac5270d5424daa2. 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/7ebd615f-e22a-4868-8144-3fdddff3169e.json and https://artists.proofprofile.net/proofs/artist/7ebd615f-e22a-4868-8144-3fdddff3169e.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 0x6ebab9a55d338ae3ed82f8bdd1ac2a3a7c266d30d812b8f37df5d01be6aef5d9. 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/NLGM11944541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc6b2545866c447fb345967bce91724aa7d7eabb415b81c3cb9eaad60025166. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLGM11944542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cc3130c1cb4630b693e7ed6aefd72ec9fe943621ed63c53eb1b42fbcf5131d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLGM11944543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10097f2a3e9bd0475b3cd6ec3718de8040b8a25ce618d09ce00e06e557e59f6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:54:00Z), 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/NLGM11944544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9c0d2f03c078287141d6bd3e35d8900a3fa2fee8fa209c1eb5fc70cf07a85. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NLGM11944545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d7674e31557a0c5b6b7438b0aa0eb90ae0e1525b76ec764cdfaa38507f988b. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:41Z), 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/NLGM11944547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28072fef2ef102dc6d2ec6d245c22492b449abfde23acf96c1bfb087a6292ce9. 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/NLGM11968442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf040b030b08fadebe37984957ea6d0416480cc20d3ab1115cef105de201f3676. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/NLGM11968445.
Prelude and Fugue In E Flat - Pianoversie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf460be9c98c110d3d47550531a5c7508b5b11dab5fe0d81c0c99bc54e19fd7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NLGM11968448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c2bbf53d7681a6f741473f55dfad251af6d4afb044187442cd0e6536203a32. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:36Z), 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/NLGM11961890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6eb5802d6b6c4239d037e34a2d4fb61034c00e54f23a9b113e0f2cb2d99988. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/NLGM11961891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc46636b70801b89e07daf9b9879b4c828f3c12b880b3eaf83609911f3706c7a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLGM11961893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a2eda55ade8da8efe850fcb12af8c7f98b7472186996ad5d1781217fa28d6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NLGM11961896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84131d59882ac6d2d66e8b960593938c21dbcb586cc32f9f25e2d936ead1ba. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLGM11961897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb635598c7507716decd9c511e2030fe10b990d80bc209df2414425b8882f3b58. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLGM11961899.
Von Fremden Länder Und Menschen - Pianoversie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1032e69f846a2d3203ba722d0025ffb25a44390ec514358234b4b819e01171. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/NLGM11961900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c7beffe5ea7d8e26d6707a7678e02f3333e275997ec601ca42fb811995aa04. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLGM12015822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f58044385039b34e8a639262ff314861de759ccd2f919419e8aa94d78ea67e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:28Z), 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/NLGM12015827.
Klassieke Muziek Voor Babys, Peuters en Kleuters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e277fd2ee9a53e1c7d99e801c54358a833e6fc98108042fb2ff48b931fd26. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NLGM12018302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66d47efe4d60decdccc863539b22d5b55a65e7e8247a6fa49591961d24ea4d9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLGM12018303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b129d5dda9563a57cc74c65ad57a757bcd413d6a7b57ebaaa7894dac0e96bad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLGM12018305.
Pianostukken voor Kinderen (Klavierstücke für die Jugend) - R. Schumann
P. Tchaikovsky - Album For The Young (After Schumann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7d783643f74e59f0dfa3c821492ac9e29235a67a4fddaedc127a6697713a3e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:17Z), 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/NLGM12135450.
Liebestraum (Love's Dream), Nr. 3, Thema (8va)
Forellenquintett (Quintet of The Trout), Theme from the 4th Movement
Mozy en de Klarinet - Kinderliedjes Deel 1
Mozy en de Klarinet - Kinderliedjes Deel 2
Op Reis Met Het Orkest - Het Strijkkwartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9bf6a22f961f33769ce792a7cd09132e830e3b8eddcd38cbe02bbc9945a9a8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL6VJ2426628.
De Leukste Klassieke Liedjes met Maestro Mozy