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 0xcc273b8964de025e66921d2e56ae5e9d35798c54ead874fc865282c78cd9e425. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac0c0323-852f-40c0-863a-81f604cc3a28.json and https://artists.proofprofile.net/proofs/artist/ac0c0323-852f-40c0-863a-81f604cc3a28.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 0xada3a5f2e06847842484bcada21ba9e31e15f5bf45bb362c8e63d1ff29977aab. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMEP2046072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc20411f81f020e94ce1ccba9e94a43e5337bf378e68fc7785328d5aadcee9c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZMEP2046074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a59e830b8a6913cf01a7bcb771286c7beeb0c825fb026139ecb950c17d67b8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:49Z), 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/QZMEP2046076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9598970b1a93cb068eafd8bf611895315f548f8c2fc4f1501abb423f59060245. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:13:19Z), 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/QZMEP2046078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc424db68002b22881b5f43eacee1fb41e37e89fbc38be5fa948ab6eb57b78c26. 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/QZMEP2046080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4f5592916ec111a8c53f3d50b4e23181fb6765f9ef7101ac8a7d98252d9782. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:02:05Z), 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/QZMEP2046082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eee6241ed0ab8182515b62bbc7cd665e8482c5ae3a6ece84714f598598ec4fd. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZMEP2046084.
Hoofd, Schouders, Knie en Teen Knisperboekje
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0b064f691118502f81f0c54e93dd063c2bd0238e7caff2fea73e622d81893a. 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/QZMEP2046085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa397dac6f36948a210cbfaca868399de811e151d2088952bd2be5634abf79112. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEP2046086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf006a6f968172c4dc93f8c28299a6509a014d7849e4be503c631c728af4051. 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/QZMEP2046087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b80d70cc3d8c975d76166d39675f4a26d049ac867fa22d8ea7e59a67ccd48d. 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/QZHNB2254464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60c57c3bb0b9ce2fdf3ecdb527d5c285ca6bcd54c3ebc9c43eba46685d53c02. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNB2254467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8489bd2e6e79ff9d221079c25090118da538ed17c6a6f246aed757e9de6c86. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNB2254469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0b92941bc597656cae6ae5f28da17fb9f137a5f49443e874f3ded9585573a. 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/QZHNB2254471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd0e52422e4253fe2aa7c4d915d31a8149ff20036cc3afac12f53fe0418c799. 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/QZHNB2254473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2b99ef5910b4a6a1053f771796bc32d1366b187ab7c6d74d1574e103a261c9. 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/QZHNB2254475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3faa0165a9dd02b7bfd5dbd12fafa908a1ce634dafeeb43bfd891fecea56934. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:16Z), 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/QZHNB2254477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6cc16f255a4ad102eea0090f7b0e3e0823de13a3c647f531523c84e6194d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNB2254479.