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 0xa12d589aa147b449adac485ec1083ccd2c4b42184590eb45911316cafb9ef632. 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/07d3668d-83cf-407d-8f93-f170509ec29c.json and https://artists.proofprofile.net/proofs/artist/07d3668d-83cf-407d-8f93-f170509ec29c.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 0xc91cc88ff4e1d69c3251c701bbfab0b13ef12842a4614b56848aecc8d5699e19. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARQIW2417304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd2b687e13f74b1903d655f43b3bbb58faad4dd8749c6479028e638d05c5ef. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX53U2312210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1775aee2483e2a6a3fc3120f14021a2e2c43ce0d8946eaa0507de8c366e0fe3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5UL1528211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0317f8039c0033af10caeb43fd3e3ea55175bdfb34396cff542cf9eae664f219. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US5UL1422152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0302b83d57eb93e2ed81653eedd22a9b47e1a219858933943fdc16612e3ca4. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US5UL1442293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f98e3135b41326fbf59050a0f9f3cf9b2651342f112515ad3da19b02d695949. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5UL0724810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf152cb791bff503dd1e0efe5296c89f7087f5b05bc4b575a98b4e3958a7691ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5UL1424411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd2bfc9753cdd3dd86493c68bb1fa31afc46981d6f0ff22dabe18580e330de. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US5UL0725463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7281a033b05e013e87bf3030b896bdfa049df3e974ad82894d916da8c27517e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5UL1501489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c79f2e16df7db774c1cd4cebaa9b9c74c955863113bfbb9ced4a2e721a3253d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US5UL1510369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4085022cd6a2a736a693bdc2b83e988afd33cdce8d4386c0253aef06db0f4cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5UL1421581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdf7e81b69c2ccce16d4d941842a69aefced836e282bdf7dabb1aa07adf3d8f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US5UL1510371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb5ea03c1875e6e9d3b8500536d58ad35de917b40c6b9b290b454e1e36f1196. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/US5UL1423325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c31495b538b780eb124bf2951721e8b86e1ffcd385df3faabb5b3c387799fc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US5UL0916994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed996f1fc71c96553c7adae320c83de7275632c649c745fb71279eee8e656ef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5UL1420459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167133bbe580d7cec13511f086750b79e6afb77a9382e7dc3400d4364e6511a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US5UL1444935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f29c977c9255631435203514ad83092aa10305d3104f44e06e12c61781d8891. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US5UL1422672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f6cd9e5c36ec4ff364cfa811519a3b657101762a6537a72db244b20a4f0289. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US5UL1448138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d5155ecd07dfc87d8781cc9647827675e02f62d6fa0c4fda599f1ed3318c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5UL1422669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b784673d514e01f543904ac936bc9d0a9d3c05b22d6520716d15e6b7483461. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US5UL1424131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb0c1bb6ae7fa90a9aed07e95d330948818b140dbdf53a7bbe5ce3f794da5e6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US5UL1501484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c70f6a7630381c431ffaaa9a7734fc7bc0ab7aa3efb841c007d92aef4e26f85. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US5UL1422670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b22b7689aa986253ed2b63ed6901c990bee83afc54cbfc94580af42c615edc. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US5UL1500559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa50f025d5000a93497a330ea863dd0eb245fae56f404eea848608623932f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5UL1421192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ff981dd6182f5e3137b070f4f24b7bb1e65068089690cb487323ab3a76a888. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US5UL0922775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846f1aeee591fa48fcf26927729f4a2762859ae18f1b985467b1a815fa5384fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US5UL0739459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c8f987e1637e92ecf02f4f66b690009324b293a243c8b824bc7971556165f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5UL1420450.
Aromatic Coffee on the Balcony and Break Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6806a0215b07279ee75056debb9457d85a89883b010e59ccb2a0709374d1966. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US5UL0724814.