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 0x2c5cf86df243a73e89a6b6bde5f5ffc70c9d8eb9209345cb4a0863ea6ba78c48. 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/fb085bda-d926-44fe-986b-5437ef999572.json and https://artists.proofprofile.net/proofs/artist/fb085bda-d926-44fe-986b-5437ef999572.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 0xf38bd24bc28a151658badfe97d4f9e1944dac53aee64a66f2d998474f0c9e981. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCADH1780725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef1a69ea96f4013f85b360361b51a3d5cf2fc45e70f0d01b13e542106b06cd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCADT1862396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fb960f7a9ee0e76f7f106eb8ac495954b1e5143306ae65979930563552b91e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAEL1914392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d082ff2cacbdb8d85e364b671be8592a0d418a1d18740883225ba6b96c7913. 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/TCAEL1914398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a81c37fa0fe5419d72aea2b32b7f002294f46862727e1d3ce6ae61f0d0f98e. 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/TCAEL1914408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5b2121074027206c1a6be6b28814083857b2be209bd4491bd33696d875c4a0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAEY2026440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d0803d08d6761590aea7d0d42d2a94e017a23943839c71c400088fa526cd3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAEY2026442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2ba260ea3dbb9e52970e67559bcdc7b3ec8ee1a0ddd5e0160edf321486e09a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFH2080176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7d8c3e9bebdd723bec3ec520894cae2288c6667f2542aaec10b2c2d7bb8b00. 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/TCAFH2080192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782eab6c40bee36de94952c92212bb6f6c9d3292f3531a0481ed589b11611b7c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAFH2080408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e71a5720fcdbd7f198f6f9a238e1cc0fd1218c588527555f9e93fff2e4de22. 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/TCAFN2181074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51346f4d1d995d61118aba8559b4607a0efc67635cabb94458973fd5ff313b7c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAFW2118159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b7e7059a8e13fad11607f7db1acc917ebc6eacb4ca8d13a38d51a4b8593638. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFW2118162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e74c211d66334f853374f2d5feae90e795fe94df5369398f8afdc7d5c62ed9. 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/TCAFW2118164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1d54e1f8f2fbcd8829a93b87593ee7904952f73f6ce546bb8bdf5755bbd85. 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/TCAFW2118168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73398a00c7151ecc21a193d1b55e40811d190c67c02e4206a48bc81e55b4612. 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/TCAHQ2320168.