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 0xaec9590dc083edc9ff755d1dcecf3fa2a8886431fd65d0841c2b010ddc5add8a. 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/e06bf50b-b04e-472b-81f0-7054e5ab4c1c.json and https://artists.proofprofile.net/proofs/artist/e06bf50b-b04e-472b-81f0-7054e5ab4c1c.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 0xf2983a363571c873da7fe166c3054cae5a9654b8a7b9373610646a3e95b00fb1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR59R1463104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe52604c1593d4f7b3fb18c77fa4547be7e72d92086a2ee70db6d977d623d2a0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FR59R1463108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c32165868539067fe1511473c03727e82d3a6200ca317937563e011ae31437d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR59R1463111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d43a17420d5ed15ce33eb3bdda516abbe8ed2c11686e43a65a78d3af5cd28f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR59R1463112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c07854204c0aa2849bd9709196cee9b5f50b1cb9fae5530368d2d4062d2825. 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/FR59R1463113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffe8fc87c7eff82713beb3017917b3b8fc950761dba08807b5cd2126fdb5ea2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR59R1463114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efad8f06f8854a2d619e21fce7a00270c8f90e23e58c8b8a53f1e089f13338. 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/HUB291200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f00061804b63012d5290a0eb899e89de7a38ee242c299f777b0e2aab5a088cc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/HUB291200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95ad940d2ea1237796ec2c85abdb2bbcc8aef364c07d0b3e7164dce14d5ee37. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/HUB291200718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c33eebd6b516b091c0fe39c5e774bba0294b030af6daf879d459b209dbdcd65. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUB291200662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc67147e68202d259212f60c0caa8f5833bda4fa4344cb048925be1e8c1966ef. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/HUB291200782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9986ca64b2d5eff5647ac123b1e41735c6694a278a15c37ed3039433a782359c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/HUC591900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18899b273eb5f223703ef3ebfd935880c0259eeabc9c275d2d536b1242a546d. 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/HUC591900282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb304ad45ac266376be52039f0fa44aa9b5f40cdf9c5e326960da5c5e638cb49e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HUC592000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8aca5e7e1396a5c2a75bc3ca8f8b8bf585394ebb7863e9ce91f57e651ed05b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/HUC592000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b11df38fcbc28a90b0c25a6da45fb79fbae9acdd7ed35de4cb5882a0630cb3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUC592000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdf6e15b654a9a301c59b56ec4ed97e0b444ca2ce296f8d553455afa647a2d9. 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/HUC591900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0689c0ca9fb942924dd72f8c0f1f8b90b4fb51c2fca9b199cf3723ad8bfd9d51. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HUC592100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf09db7e1692a2e38e367f3639f4592e72227f7d8b25cbf5560b94137dbfa1. 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/HUC592100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea580f222e4e05a6c88e299ce15d99bb2867b1eeb11da09e77928eeeaab04d0c. 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/HUC592100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f92e773fba4487089dab6b872fc56400aac7592d60cd414cac1c3e20a8b28. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/HUC592200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8f8ad82bd835279d9883b002352ba21dd35c32774a53a2b5ec374221fcf1e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUC592400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc1d6b07d737cc4085cc94ee86803b2eee63fdae9c073216181aa7484c511b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/HUC592400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd722439671fb350d541c532fdcc55af184603156cead564212f84f24d236a69d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/HUC592400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4cfb29c0d4638b3995b33476bd9f95f953bf8e2b618adf88d7e34bc03062ad. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/HUC592200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e9038b52063b5ad20049dbe87d1e361b2dde17ff0b398738f1a5483631f3eb. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/HUC592300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b289f24b8e94e56d2ab3e500390a3b21609a8cfcc10554665d26c8616a4cf3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HUC592500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc37c9ba415b3b07b1a818581cae9f0f96771720ff62c5e64546c03a325d8d8. 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/HUC592500127.