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 0x6bb9fa26fb18786b01e08487471ebabeb1951b8953ebe6270a0af6fd42154ee3. 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/9648180d-da56-44d3-8882-4a7a1faf3914.json and https://artists.proofprofile.net/proofs/artist/9648180d-da56-44d3-8882-4a7a1faf3914.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 0x11dba72ad54fa6bdd63deb13e7794f863e6a8c8ff10692d71e227a7f721af92e. 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/GBSMU3184691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246fc584b7956eb2d34e4772f1c0a9e291f5a5b2b485beea7cd2d1a19042c7f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU3184693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96253cc2b5a6ed2b046bd1d80c345335f0a8318aa0e398c1bfdeac5be399c2dd. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBSMU3184694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859466105ec52cc61de26677cd3f8000fda8bc3eebbfc0f5bf051d37b36e9fbf. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCADO1857846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf7001b6b3d06e7b18e5970c23ea58fea19e53773fc0774173c5d0cbe1b5d70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADO1857848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9c81767944cda8c7c80cb8f944ec1e3580622855ae1f5d6d9e458dec26ab44. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/TCADO1857856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd0255c871536d878fa910a05432f61fd807859e7a264fd4e0b4efdaee7490. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCADO1857860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d556f1761c4cadf6ab16a6c06f15ee3a2cd581632930dc5a3e037c87713901f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADO1857862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc0786ecc46e2f388eabf7d82066a50b031cec2e51386e087f852932478a99a. 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/QZTA32202804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa401230982cba2671a392c9acb79d91c3aaf36f22b6cf8b975a3fd6cd43f340. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZTA32202806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb26ec236b5fda4739a3c8c70343e76852ce6e9a197cd2a156f6a08ec314ba. 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/QZTA32202808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c2e6cf8de6e5af4be91d6683ab0b9f5eccc7649b1daa802aa27e3e6ff629c7. 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/QZTA32202809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870778440cc43db8dc9af631c54c231fdf16c495b521c25c97792f024fb85859. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZTA32202810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc67d4f1e20392aac7fed737fc0c0738b520c1ff3a260d4d3fc594e07612c9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTA32402801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e919ed9d0ea624df18b6a9d508b7565df7e02fed8ea7aed3030d98af7f1504. 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/QZTA32404302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0830439b7de7742ab317a2fda10221f96c0f0209d56c8539e4719e0178e3fda2. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTA32404307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657004794d3b0d976c375178972c45a3ac002202c841ec8930876af59f297aa9. 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/QZTA32404309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7212357de2f2b1979fd5b55378c1910ad28fec06405463a70647113311db5f5. 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/QZTA32404308.