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 0x179a4a4bf338689fa4bb0e5819a9c5f016fd5dcff7d4b71ee14eb8662c45e070. 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/f435fef4-3780-4d73-908f-0fd2483ce2ec.json and https://artists.proofprofile.net/proofs/artist/f435fef4-3780-4d73-908f-0fd2483ce2ec.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 0x95384c60175f39e62cf52baea0a26086ca2d1b0a25953e0ad27bf8750d425de0. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:53:27Z), 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/TCACR1661544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb91ef3b835d304025a4423ee2fb6696f3f4ba2a03ce2d57fcb505e456e20d. 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/USL4Q1961565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee079021a99d89fcb09b1e153b4ae37c83da96962fdb650d705064a78379432. 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/USL4Q1961566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858cdf063f9c67ff2486a9e57af0ebe2c2ebeaac3fc9ee3a64e7020b75432b10. 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/USL4Q1961567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d30866c1a5fb52f3d18b8421ea5a1be31de4bc400a311db1f9d7d7ecb8d259. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USL4Q1961569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f5290e1ac7bacc2b16d26ad5fcd594bb06a1e0c9810937e1d335ca90545494. 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/USL4Q1961570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5473510b72366879fe946ac09a97b2fdaa0fd321dfc8a2c1c719a7be798340e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USL4Q1961571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e110ab4e4e4a8c9398b0184d277ed9684b3cf2271a3a5cdae2d32c9a716d28. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USL4Q1961572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd09eab060f7d3b97203436b0fd44e2a6c7faf5f63f80ab1e5e4e0f09306615e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USL4Q1961573.
Spirits, Spilled Modelo, and the Sound of Cuban Salsa Bands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b3dbc1820de1bd239ea0049f2b7162c5f8b67bc142c0599e564c4c93b059ee. 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/QZHNB2298432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0301d4eb36c79de47e687bdaf329d01c7a96f001781df3fe5c3a9c5f3f7c7. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZHNB2298434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58c9babe40a477303e8c26f46764d95abab764180c7de96a3c106a7f2b3229. 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/QZHNB2298435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2315349447500ce2840683356cb05bd827ee032f4670c1e1af0a9c06261ddf66. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:02Z), 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/QZNWW2124188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045a5009e4363465c9668c023621618f3eb2924421a2db7e52dc913d6ff4caaa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ32249861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d5607637efadb86d4578c2fa742f99a93fac4b73c7f401a79f5064fcf1cdc9. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZMEM2538808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500f1bca676ed56265f2f3b3d8cd5b3f796a1cef2c46784c7b0146e19289235. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAZ2526334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d5607637efadb86d4578c2fa742f99a93fac4b73c7f401a79f5064fcf1cdc9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEM2538808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0477b2e16e311d4bc2ce500a10059a14a5b96910bef3b86eefe17b30de40d9c. 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/QZHNC2582292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f422e5660bb4565159dad537918323e45e3a03a272bf5647c3602a11860834. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAZ2526333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500f1bca676ed56265f2f3b3d8cd5b3f796a1cef2c46784c7b0146e19289235. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:38Z), 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/QZTAZ2526334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d5607637efadb86d4578c2fa742f99a93fac4b73c7f401a79f5064fcf1cdc9. 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/QZMEM2538808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0477b2e16e311d4bc2ce500a10059a14a5b96910bef3b86eefe17b30de40d9c. 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/QZHNC2582292.