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 0x2611ef9281a8634fe1b82670d179e6cc574363596bb64e81d70b6a794b9004cc. 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/a5a0e323-3317-491b-87dd-a1a933596deb.json and https://artists.proofprofile.net/proofs/artist/a5a0e323-3317-491b-87dd-a1a933596deb.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 0xd0e54eac4ecbcef751b7796b2bf85cfcb5f918bc309ebe3b765d2200bf094784. 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/DELJ82092597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d9f2e43f33ffebdf4ab3704b574e8232216b2a8f8d13916692c15fa7b0809. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEGR82015875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805de1e8d39c3f23ff862f54eba69044d04b5f48f0ca1d2674f54b01acd34eac. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEXN82223161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8efbd464cc60f2f2c253acd105f91e8f358229dd3c54b6b177861e216567ab. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:25:55Z), 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/DEZZ42150623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0605949cf71675d798841905ce7017ab3ebe7eea17bd212906c646a7d85e2. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEZZ42150625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95be1a60e889288a00d230f720ed7a6c33970436c47bd731540cb420759c26. 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/DEXN92239725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b260a49c81f9e31e9da242e66da8a68d57bef350ad19f645bbe98becedae57. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZZ52170265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c1ab9b45321ec77e965860b3be2e9ffc29b83db5799d3d2d94fd8e9e781eab. 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/DEXN92239722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4816ad0bab27ddd05f7b5aeb71752c73a31246d6a71095526c516e217cdd1b90. 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/DEXN92239724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95be1a60e889288a00d230f720ed7a6c33970436c47bd731540cb420759c26. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEXN92239725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481b42181e54045da50ac7e225a6bca7b037e0228ab9ec75e3ebedc67c30ce74. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEXN92239727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb5fe65687bcd5b304f00124e104b9eaaa0b731505c0933c529ae739f67a6e3. 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/DEZZ52170261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841953d25ed251531f2f70b5677e667d882331b9bbf8b8f60decc902c839f5d8. 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/DEZZ52170263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb70ecea5df86d5713c9ee1737ae89b0d680c20b9f03a5f3f9634edbaa0451a. 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/DEZZ52170264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc0d344f9183b0b0e4d47383a4fbbecb6fe4c0d24b4d84710a5d8082a7111b2. 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/DEXN92239720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b260a49c81f9e31e9da242e66da8a68d57bef350ad19f645bbe98becedae57. 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/DEZZ52170265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7400ef6a6ad886dbbe81881191c5449bc48e68465dfa6ed844bbac3827fc073. 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/DEZZ52170266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4dddc56679d318ecc17bb87f7e0a345b6487c7658eac6dd35f7afb190fd6b. 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/DEZZ52170267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9620f481ac0e4ca1eac6cc3d272f30cf14a4c1098f9c5814cd5ac7bcb31f9dc5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEUD92389231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35a6c286ea69cdd316b48a247ca90a09c89db4f3fe23c519a0f4875708f6c7b. 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/DEXO82218134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfdb75275053ab7130914f750eb457a2a9af78dcdb46216dea81cab2c4ef427. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEXO82218137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe302ecbc24a39d1df8787dffb02a4cfe7d852d62421def676d1b0978465a8acb. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEXO12305869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae534035d1908336601f235423c47adb618d672ea9a145df7c441f803aed76d6. 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/DEXO42388233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f6aea7d2263f8bdcdc5b82942c0da20084916e5ef617d9ec89a0b4c2819c29. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:59Z), 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/DEXO42388242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe71b5ff6668f6ed14c416f977f0edf60351bfd509289bd91249a04952f374. 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/DEXO42388251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd0b94ef5f8c30ca9514ae9446f1e598a1395efb72ef9d6ea4fa70e0bd804e4. 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/DEXO42388252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa479901fb676d3cda545003fa0a8a6e2d28daed67f593a8e28c0de5ea995cc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEXN82408105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853c5538481fba7e2618b90afe77caae3865943d8f2c3edc98fc2a518ac9f9ea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEXN82408106.