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 0x886f9589ed6aa62f9e7bd42ab3b119b8b03a3688ceef6adeb52f52838d704892. 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/cfaebdd7-fbdf-4a76-9bcd-71ba1beba271.json and https://artists.proofprofile.net/proofs/artist/cfaebdd7-fbdf-4a76-9bcd-71ba1beba271.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 0x468eb33c11a9d32dd09a3eb68e9d755d987a473aa27404ba3c6203491c6db61e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHZ31992141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa451d90f595a4d798a99758cf5a2895856479fb4f03a9d9bec85b8743cba8. 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/QZHZ31992142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f876a841e7c47ce2897e0ff57bef7e41dd3236a6f8e40c4b3b20c5644b81d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHZ31992145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b997540b6a4ed883ba444af0ec93d7e73255e3c58e37c751efbb4d6b9a4806d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHZ31992146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6e6b683a07d4306589c74528b62a72f228aa953f7abba1772806c023837f9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHZ31992149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e060512bfe3a2fdf479cee889c64f627e2e97868c07d8442461ed2759f3cc10. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHZ31992150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e9ef884e981f4648328b02fd5069675ec473cc7649282b28966018da0b5dde. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZNJW2407618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06c248713034a5098dec2eaa2a6b02732359cb3aca9399899750457bad5a417. 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/QZHZ41935254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ff74475872f4e0f47a60f3a423a739c5bdbf73252644db1c12d5d277757ef. 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/QZHZ41935258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c1a37f7f18298b1f3771a061ecb5312d39d67892a12b1280924888005c0d8f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHZ41935260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b17e2400f71bf6d24905daa9fa57ccb23541f72474932fa7552d6f7a742082. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHZ41935261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721bc6600c512cca9c5ab74f79f0c5be69afd9664ebef2b6320f2a2553ca81ac. 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/QZHZ41935262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901999509af3f09a52de814ae34d8e4ebcb415a1625b652967cf6783168278fb. 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/QZHZ41935263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1237baae5868c6715e3f241f2801ec5129697d297ae69f1ac595c91628bd67ab. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZHZ41935265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf8d10d9484002326f68ee2ea11d76329bed96f5868471f981c511af0df84cf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHZ41935266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5caae9b07375a921eac2c9272f203fe46c3f0e3c665d429d1fce536bbc0831. 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/QZHZ41935268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f0ad92cb3150e4529c72421f20a1dddec704d7aa5b1943ee6b160876d9cee. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:45:59Z), 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/QZNJV2487341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee7dfe8d7450a38065e809c339ab64a48bbafe12254bc94957289648bc6269b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:13Z), 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/QZNJV2429710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41099de3cbdf375f61ba715bf3f877cd740d855ef48fc40980220582761cc141. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:45Z), 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/QZNJV2455166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7fba0aae1baf93ddf62445ab7f313a7f3deae518af3c7927a03c2181d26de4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLM1966501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea80841e5b1605712eeedb767328c0a907092d712a63c23ab754ad0fc83a756. 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/QZGLM1966505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e66381208ad9c496c205b731c11fac6755ee9c1999837e6b24a48d2b21ec52. 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/QZGLM1966506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d28028418d0a6b02660ff8f17515dd4a5a326a4bedae159fc93f83631bb765d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:42Z), 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/QZNJW2450344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87eef64c0013c890669bf7c7398a52a86cc9f1d507d01dc246f14e3bd06bcd0. 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/QZNJV2455139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d4502b502f1bc1a5e2966ba5b9ce61c52ed25cd092cbf7b7a2e3ddc87349fb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:12:06Z), 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/QZNJW2403566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ef3e899370052737367b083c97129d9884140dbd25fd6ec01c49d70162f04c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNJV2481157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b5bd80445432368233c9d14447262651f6e00bb9d1dfd7015d00426b87e85a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNJW2491523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4036b654f252c42215304c76e6f6f516687de422bbdbbca18f4ebe97ffa2114c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHZ62094502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8a89162f33186c3c34fcad61b833950e990b3d9b5091c690a32c50a18b2a02. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:17Z), 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/QZNJV2075548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f57096b0f497b3699717db45cabd3469d779a131030d729b7de50282c19157. 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/QZTPX2143216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d8e119b9e611424444da27b35020ecd8f06710dfea4e7141fede6ee58c3de. 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/QZNJV2405118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a07696f402e44845c016378286791df780843efcbc4ccbf9baa150b7873f31d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJZ2410895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b30896965df7efe6400332cfd7a29aba06e6fb771ba1bc0251b9a031f3cff0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJX2594435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72f55bc5a030f56659184ebbe19eb53f4d91afb98705a45c5face69421f16bc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNJY2550525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5288ee0bfe0950261bb4756a0e6457e391a1ecc4c6013ff05f55eba49a9cfbe. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNJY2550526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80053afe3bcc120bd110896733c50ec8ffd56f22387978bf617ee018e6b4b529. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:55Z), 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/QZNJY2550529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c651392d69b79934a60e7de4227f614b762a53c408344d407221a80c8d462. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJY2550530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e07dfb50bb17dab9e14d28c0cd691020e061624a24aad22879b27708447dbb. 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/QZNJY2550531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3413e638b91f793bcefb97c62464df73205c015ccef7b9864f14138e1454c7. 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/QZNJY2550532.