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 0x235bb7c4a92f1c06c682218d4a1769eea429be7134c4e1edc2b7dbbf85218c64. 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/9ae84763-9ead-4470-a584-1672ec5f60b3.json and https://artists.proofprofile.net/proofs/artist/9ae84763-9ead-4470-a584-1672ec5f60b3.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 0x0e0d4954ceda6ba9d0489b56a8733cbab6810b63f34dff506be4ac43c17f2fb6. 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/ZA56E2200565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26defaea4ab173702c8a1dce866573ef66049f3a85ea171e95b83c34e786b30b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ZA56E2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cae17dbad0bbe8570838ebe7052b6ca34d35cdc9ba9d5546e02f64ac031049. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXD7V2469506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb48557545202b6b9117117e1bac6f945b054b62bc1339c1130d9f92f4999315. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AEA3A2390969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197b77fc304fb525ec6125ed88d3de92d17e799bad4f0cc6788838f18aebf28f. 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/GXD7G2425722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47f058ea564dab7aa73b4f528dca4fa82bb89abe5253b51c3ca436c44fb0f5a. 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/SGW502421006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b26a84739d7fb50812a77e3bd7c4c1d73523e876846b67e0bcdfa0dcc9246b. 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/SGB502495920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbe89c194d8c647f5258accca1e74792d5d3eadc708075aee83ea3e7fe2cfc6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GXBAV2492277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee26d38f243f9f6fbbc5bc83b0cdbb13ad9fe379bdac2dbe36c6a3c5b1c78a0. 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/GXBAV2397703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28379a8d5788412d60a75daf5724315105f0880caf2ec6312e710096d86e4b53. 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/GXBAV2397705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc515fc6165a0cfe01728e72ecc289bdbb85381e3d8b07cde91d0c016eee29a24. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ZA56E2201272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa532987a6d4060789e751c53739227bf54484ebae6a9527359ce35d7ef0b1450. 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/ZAE5F2000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8dffacd534d378b6ff78e0c61391b90ad8b23f896fab0fe71d6a4c95eaddac. 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/ZAE5F1900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cb4d34c7b02ecc112f543113bbbbc57568e2e25e09692256b239e13c949ced. 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/ZAE5F1800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe090d975a9a907172b97276d9f340584493770f8a512ce663c03633cc66a9dcd. 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/ZADGR2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283a9ffc0be8f55b12738f743f48981718d3bab3220993fcdbc11bce6ba0c5d5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ZADGR2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2724568b6827bdca947dc94081026e2a761cce1674d6d35ae171e5e41fe9ec. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAMN61700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251c28474622c96c80150d27d7be8239e5350bc27305dee1144fdeb0a75ad0af. 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/ZAMN61700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9042957b5b9a7a4da0452b07c67d557349e7492081ebb3b4b9b8c83c7f35498b. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ZAMN61700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7eaaa151b888204ad1b1329a3e63a12d2440e06f0d808635f8e64a285e8de. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ZAMN61700004.