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 0xf4dd8c6389e79438dcc3ff7108c54323c1c070803788eed3c58bce9d7b9d365d. 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/bef84ef7-45f5-488d-b57d-2ea24045d03f.json and https://artists.proofprofile.net/proofs/artist/bef84ef7-45f5-488d-b57d-2ea24045d03f.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 0x677e2613fb379464049dce5acd43541ce3eac2c42a5cc562094f86004f7ab656. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAIM2447690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c0cd9be443347157ae3eb0b6d38661d231525593a52e5dc10154353588e7ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIM2448012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04555394a22a3142c6706c98e641c812d21d475bf57260228541b7cbb933dc15. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAIN2448027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e2c7e0158b2d817d55038862625b935294b06baaee67c44c871baa756b3203. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAIN2448036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f088c815828b8b79ac911d536ee8684912b30475f69532f6646a9e39af2941e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIN2448046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb858abe31d29bbc0b7b6270ab806c6998c65df21e1f21978cfa671fc5f436220. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAIN2448058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9a76d907001be4a7303146d23ad019f05b5fb6b092ebe10a726eb850c2787. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAIN2448065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b18eb982eda5e397c965fa74407092e6f05d2237235059c4858f11aa642469. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAIM2448481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4780bd06ee142833cb6b89a4cea36583f8bdf12867469bebb24c4db6400a6b05. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAIO2488709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c10d13b5cf8220e9e2d4bbe0e2f33e871a6115814e4287afb8c7af94c961a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIN2488620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4721da63af31d5ab73e7affad9f6bfb6d6e803f28e9781f8c337be82975f34f1. 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/TCAIO2488768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a51e93c03734735211052f66533055bbae7777cc0e937aa72190957ea5ddb09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIN2488636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d9488c840fc392047c158c09217833b7aa3f394438ecdf4ab961dc15c41e97. 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/TCAIO2488780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709223b2457c3c69185b89c3a1451bf945d6dedbff4b53234388e5c724e9dd23. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIQ2413249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac327ce460083c0b3fae98ba9c5fffd9ed1f21a45f90f76e6304536a088b2ed. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAIQ2413434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30430b76cfaf4c76c8e5ab27f2dfe3c64d4194b69f5c827a156c3c8313e6a0a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAIQ2413445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b18d5cd12e140b08b7ac768fb0ca38b91b1afbbd686a7c13d5634b5b6033aec. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIQ2455133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5fde21fce99124f2345fc460e90e7a376b7cda1784179318eca3b62e3f76ba. 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/TCAIT2410799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2456dd64d95b6ff45987e4af86172c3231a68a3f2de2aaea066f7ceb2485a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIZ2449173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9015bfb793c086b806e961fd78b68dad67e7196b53b64badae26b7320f2bc453. 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/TCAKA2520831.