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 0xbde795b73b2271c4b3df634e03a98ffdae9d2d26551a2f165cc409bd95c4f56f. 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/f8d2a62e-1db7-4779-a2f4-b1fcbc4dfc75.json and https://artists.proofprofile.net/proofs/artist/f8d2a62e-1db7-4779-a2f4-b1fcbc4dfc75.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 0xdb1bb051baee995106407b72057c4e38ed251fe97b676d54cc5ee9c0981ee92b. 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/NL2094000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc944e496f5e64258576c4633ca3459c2bce4b6d76df64d58cd2941150f1793dc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLA200500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac358f7351838376c81ae5be42e62672e4110288a9def781a5affa50e7ac949. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:30Z), 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/NL2094000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1855f001cb18a56e753a8aa5215252d30c040d87ab3b6d78fa6a9a07b5aaba50. 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/NL2094000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde63e51f790bab906e3bad398f09e93feb079a5d7c56063aa0ae4262c86a138. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NL2094000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a2fcdf18e35e28ded586f470bd6a135d5370ee0a6e689238bb997ab411219a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:00Z), 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/NLA319700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061dae3b61ad154c5d57dead6fe44a09112bf2ff84de6914a49f65dc92df6ff6. 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/NLZ1Q2000005.
Zou Je Niettegenstaande De Recente Gebeurtenissen Toch Nog Een Verblijf Op Amoureus Gebied In Overweging Willen Nemen Alsjeblieft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b022ded611819acea9dacf5c5fae7196a8180fec5decd4060a204d0b99fded. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:44Z), 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/NLZ1Q2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99244d3ceec17c603309724591e2e3e7486872609fcc9e31f9edd4a6a63b173e. 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/NLD320200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2db9416a1c55ffa8c8c9e01c290d0126957252ce88c4a6403e9d6a82a4508ed. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/NLD320200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525a18af4f1ed1e75a7d2786a3895dddd127ee883263ecd306ad466c6a3ddd8. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:41:05Z), 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/NLD320200016.
Jan Douwe Kroeske presents: 2 Meter Sessions, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a30a99c274fb1b074323f6be9df1c231e2bfb438b2b1eafee6ac2674919a599. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL07C1700546.
Jan Douwe Kroeske presents: The Best of 2 Meter Sessions 1987-2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a30a99c274fb1b074323f6be9df1c231e2bfb438b2b1eafee6ac2674919a599. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:42:43Z), 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/NL07C1700546.