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 0xf33e835e61555e1d5de72329de30b08658d7f70e06fdfefa927a1c6a6b0c0b1b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb02b1b1-c167-4118-8712-a51ef5c996e3.json and https://artists.proofprofile.net/proofs/artist/eb02b1b1-c167-4118-8712-a51ef5c996e3.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 0x45dd2690208c90e4f7b575afc7f8246683fe2d1748736dc2438b26cd02ec6d24. 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/TWJ211100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49db770c058779d870fa1d4c0aab0c97aa4d16a7423c941a619e43ed166541f5. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:37:29Z), 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/TWJ211100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796085efef5d63ba57a3a484685316e19eb54c0aa6448a8247e7b850a646cbe0. 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/TWJ211100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c1fa725d17c3cc34db6c6af9bcc05feea4f19ba335db1192e3bc2127fe188. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:00Z), 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/TWJ211100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff13741e531486640901626d66cf166e832a3f6cd59678a7d762d479857ef63. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TWJ211100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7cce68bf36d21a95d0dafba512ceb33f354353b52d6538dc74f179dd520447. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWJ211100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb418fea44230454ffb0a7affbbb68df22ab4bfe67a9a5b3ba31af02bd4849fc8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:59:47Z), 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/TWJ211100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5c4d163aea186b520d1b980837762a353c562f1fed9d77913484d74f32de35. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:06:50Z), 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/TWJ211100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb4fd32074c9625b6fe2d3ca27e7273c8e95d9d4c7acadfc4b1636bc37f7c64. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:30:27Z), 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/TWJ211100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b7a5643320e20921b0f4186d1a33f3ccef03be04faf57d37c00441ece7375a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWJ211100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e11317d477d04328fa34c425e82fbbdd5facf8d59ab570823e8e9c188f0b228. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:22Z), 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/TWJ211100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef1955b941b2d7fb46639c9920a35ede653ef480af7a506913ce3d4f6fe9f6d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TWJ211100012.