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 0x73529fb62a0ad84619719e79c4f4e6fc663601a3e120984c578b0efc819996fe. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c07234f2-8328-485b-a3f8-c4c9464a986b.json and https://artists.proofprofile.net/proofs/artist/c07234f2-8328-485b-a3f8-c4c9464a986b.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 0x4e11344f7677d1d097f8c27936dc07264182bbfccb0212baa17b4fa49b303a16. 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/QZFYZ2390765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43156abab75d4754238743ae37233e5fbde30a0c0bc9e006ec4c3d941ba370c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:29Z), 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/QZFYZ2383481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3fd3557d2f22e165f533c71d635abcb46acb59772b2d27bb1eee2e20c855e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZFZ42365108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d15437e0679b7671931c8eb07c293aaf6d6fceddd686deed88203ad08a48136. 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/QZMEN2320080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438807d936f2b352d88ad90c55c17eefbf594348d7336f3ac10e1eae4af8856e. 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/QZNWQ2326134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063c79212ae3b8786f372b223ed281631266c0a1550acfbea247ddbf9a069a4. 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/QZTB22300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17169a7b85688053bcbf584c15de127a40091cc06c015780e62dc44ebfeda9. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZWFJ2360463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664c266c250f9b7590e36f3e77fa614dda97e79a5359efed9fc0b17b385c42d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:22Z), 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/QZWFJ2360465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12038efae5a778be60488bc5650846bf02b7744aa1ace6cbec07f9a373e8b6a. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:19:09Z), 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/QZES92477583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307caaf3e7efa49acc5505648a2f079a2911782b843f2bb56015c6a037c18b2c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZES92490882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93e9c621e1e546aef20e2a28f9ffbd16a4ec588ef23edb722d3f2881c4ecbc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZZ772472023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e284911e124bb864d2718dddd2b0945e3e49ef04499cccb900c9c8013c01a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:02:09Z), 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/QZFZ22515607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e02002969ed05f79bc00fa8289ca856d63d7459f37a59029f100b3f05cbf6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:07:24Z), 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/QZNWT2523610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a4e912dbdc327c879f3ec294dca51511943fbeafafbdea9eaee12f780610c2. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/CH7812537559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be5009001c0200097f0423ce9facfd6142d198ad91901c1a19e69ed79254f7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH7812539209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef621759ab63c46f807f0012bf353ad77807da2c3a437f61fe6c08805e46b0d. 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/QZWFJ2549225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba92898c340738c1595ad37f50f923d2c84298f1a8b302c13be3926f6d3093. 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/QZDQH2533634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82fe77b031469e4c8efb11792a4730b8c8866995c955cafff374768e2e456a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7819509867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d623a361491a146d67bb84e2a75e44016856a4e79fcb1a9649deb35c414b26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7819509863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6a63e007866aa2c417cd14ec242c2d5cbf75d10d39857f0f152e14b06ac3e5. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/CH7819509866.
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 0xea57c7c029bd783fb6c211b9f0e0564244dac50e6257186eb14827c74e766686. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH7819509865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc3e04578c659ab8f4e4f18e2a2dae6983aa3eb24f5f7af3c191fd688bb92f8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH7819509862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56031cd1d00bcb222902aa9b8a3fc046d46169ec5553a8c45e0683dc4b0dc7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CH7819509861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d5a04796c8968a276c6276f979cba5d697199b033e1151781914867353c65e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH7819500318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525537d86d22c5dad285d0f9a0bfde95189e6ae0786c3affaba84c3901e7040b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CH7819577319.