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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396622650f05d1e2c029cc79918801dd61761a804ee08d75e94afeef8ac21cf. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71a50c7e-9334-4bb2-8b3b-30c577686976.json and https://artists.proofprofile.net/proofs/artist/71a50c7e-9334-4bb2-8b3b-30c577686976.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04dc1274c7c133ebc189144f3b481945f22b4bb4af7bce1f9b464686fa2b223. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOFYF2404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037204ffd110754056c17e8629752868fedba2afdb73e8b7a8197132ca735c53. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2404020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2511ca09a11693e15af3ff6232b88b32f93dfd0685a460b78b69ebf8bf4e623. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOFYF2404030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b75cd15dfde0541d0c65387fd2eb402b4cbe3f0589e8b160d88d9133409af6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOFYF2404040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c53159a5e9c7fcb8dc785150403f4c9b1b2b7ff535490e071e8160425fdfc5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2404050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef571dfd368e7f36073afc2591f12ba827b64eee3f648266903e321b0f159838. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/NOFYF2404060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c8e0491e71078205fb63797d26eec05e77e4a0f4ca160a3d26bd17342d4db6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NOFYF2404070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2002f4bfd56559b20d61fcc80b462a55c38d17a9f170790f817a02569e5beb8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2404080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9becd93588ca52b8c490ead915bde696b6e7312297fb8929cc5e8ce443164cc4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOFYF2404090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d98c11585e9e7a1f51149c765222daadcd7796753c896444e3174a006175c7. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NOFYF2404100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920d153cf8fee5a73ad3db12a25e3925a3fed30fb798ec0e9149ef17ff0cc49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2404110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd98c480c373f0c3e6fad946adde2eb0e120163c53cafb21e13f93433a48c6f. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/NOFYF2203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0c8b026bad8e87edbd8d120dcec10f0d0015a12be17b26b2969c0a112ea976. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/NOFYF2203020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3f8a2ed73f967c45602304454e44df85ff11323d4c1018a2e3d138976aa270. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOFYF2203050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f411cb2a10010e3461f27c1631ea29f6d454b07d500444e5790772c6599a1e2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOFYF2203080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0beb27eceb1462d9009ae69f908fb858570b47530bf2cbefb1d9af0587fd7d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOFYF2203090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ae943b387728ba60d2f30f6c83ecbe3e8a97e4d819fd28c98faca6826cf2c0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NOFYF2203120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46508d48779b3f063f152cba474d2c4070034d10594b3c9bb68c1ff58032e1e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2011010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d212ad199d13150090976fe3534298f5057a5e01e05076b4446614037001c20. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOFYF2011020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab8638eebe57cc151c50f43be52ed2299bdc900c87ca25a07e0c1501cffd354. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2011030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95d78da9de0ff08291c8ebd40d0ebccded3d98dd758a7a8ee74bd0ddb5d6205. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOFYF2011040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be2726eeb53de66c898d06074ba1f0e36c7cf90a0a54c93f4b7e1fa6bd9aad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2011050.
Den hurtigste af 200 millioner sædceller
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd3622a56bafe385a491d1f16d22053ec1ea6cd02cb9e313daa8ca280a5b13d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOFYF2011060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87ac86c28116babaef9f2bb570b47421cdba7ca00372e47c0e31edc7639413. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2011070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1ffc3eaa0d4654d095637580f5cb0035d9d62fe3bacc19f7af23a00b1b13b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOFYF2011080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbb4de68df5e5fc6709dad16a795686471d81cb2193dda4c455ae2a908b0eb8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NOFYF2011090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c73ba5f9bc23ae6deb2e9ed87268e76c788f07b5a4f86917a089cf3ae44b3fc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOFYF2011110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8261ca211e6644b46868d674e89af263dcb7b6509f7ce1ee7fb7c70589bafc65. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOFYF2011120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2511ca09a11693e15af3ff6232b88b32f93dfd0685a460b78b69ebf8bf4e623. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2404030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b75cd15dfde0541d0c65387fd2eb402b4cbe3f0589e8b160d88d9133409af6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFYF2404040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392985aa67da3e16b4028da4897028606007944bcaa01118fe0190a80ffc7d2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOFYF1907020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b6f223594b5aa130bb0bdbdcddd740117081e264a62473b7cbcf6abaefee87. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOFYF1907010.