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 0x6f2200aadb9dba698e8595fd228f7c3507da46060d3a36aac8ea43b37e55776c. 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/26f9ff0a-7e06-45cd-8ef9-b071290bd566.json and https://artists.proofprofile.net/proofs/artist/26f9ff0a-7e06-45cd-8ef9-b071290bd566.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 0xb7ac297b5bf8a6cdec7351405914a33d61e063b02fee816634bc10dadcf53e6e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:16Z), 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/GB8KE2404892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd27981bc776c66aae13aa40194e506878d4545c00cf9910faa9d9a8449da9aa. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GB8KE2406906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb3129239a691e661668f750e86c288d04e2f638e4abe2b35b634ca62453cca. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GB8KE2410055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b336ea606c49156e2f027f4f064e4bd6d907e0a3e4310ff75d3a4274c49ccc0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB8KE2418276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56612cac316f9e09ecfb01f0a30a35be9a35889b05f165bf630303589c4206b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ762468153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56612cac316f9e09ecfb01f0a30a35be9a35889b05f165bf630303589c4206b6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:18Z), 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/QZZ762468153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf91491801ae7f0bd9686b9643fa53f51031b6acc5420c30425d362d6953684. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GB8KE2425408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d20cf332139b428058fb3ee7a34cddfdf3ce69bd5c98fc7cc5440ee2fa58662. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN42559076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca49a561c78b3635def3315ed26992e997cc28d9b6724ef017ad99f25b43e22. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN42559077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d20cf332139b428058fb3ee7a34cddfdf3ce69bd5c98fc7cc5440ee2fa58662. 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/QZHN42559076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca49a561c78b3635def3315ed26992e997cc28d9b6724ef017ad99f25b43e22. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHN42559077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa704b060d1acf938842790a24ad55536c488a260f823a64fa818c3aecf4dd7da. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/GB8KE2504430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e6131bb72c51118457156cca230719ef425c3ae24687466f1541091a9b955a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN62572214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0233a3ba800d8af8f58c2170f8332249483ba97b5107338e129d54b65696696. 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/QZHN72546515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e202903615116daf30ab97ab728dc2ad54170cbcbd14dffa84a6a027893e7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GB8KE2507516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebf5c964c8fc7288a89922cd2d7d1bd91ec4c8210e453e6db025c58c444fb92. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:09Z), 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/QZK6M2502231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a4f13274387dac7dd8dfb99f117e4aad095e821eca554db8a937c773703bc8. 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/GB8KE2507600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21071a39ca75e254a3b7ac94e716bb8212ad870c3c9deee4cb82c6927ee0dd. 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/QZK6F2545144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29605e36783cb7e5a733b69d007a0cfb08030e51b0e4f68e3e04c45e1a788682. 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/QZNWZ2516605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3303868c382dcac734ceae99863f3f4dc7e8db261392ad3b45c0809a1b3599a8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP42533831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972077fe5ab8e802b72efc00f75380f71a8c3da769a4cd932a4360bc33afd598. 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/QZTAU2558439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664e396a20ded29b7e268db87cf1071467df06ea0f82a51e3ff416d752ae7218. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB82592784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7962549d559c2e36238048a92bb4a83a05d007134f9d777cb56ab1f232a967. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFE2519760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7962549d559c2e36238048a92bb4a83a05d007134f9d777cb56ab1f232a967. 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/QZWFE2519760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49789a269bd8a2f99f41ed301cc81207ba437dc91014d0d1dcbfef05eeb945d8. 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/GB8KE2518508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1138c5a264f0cd706919ba367f29c569a5e7682388ce3d0152c0cfa4b90e8e4d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE2521414.