thumb|Harmattan Haze in Abuja thumb|right|Haze over the Mojave Desert from a brush fire in Santa Barbara, California, seen as the Sun descends on the 2016 June solstice, allows the Sun to be photograp
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 0x0c5c7e9539131409fc945dec9db634c198ce6f852b13180be591f8f3c8e86ed1. 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/9f5de267-f9c6-46e7-801e-c579e31420d1.json and https://artists.proofprofile.net/proofs/artist/9f5de267-f9c6-46e7-801e-c579e31420d1.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 0x659cdc361afc3f737f6057182a4cb621e026f374db4a2c03eb349e585f796f15. 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/TCJPQ2153224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93a232bf6a4e5ff4944738a74648d19b300dca885d226c328867248e4408648. 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/TCJPS2275379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93a232bf6a4e5ff4944738a74648d19b300dca885d226c328867248e4408648. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCJPS2275379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdbe4206a67a09b8f5b3c91ef254ae95027206aee9c4733c995975fe057a9c0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCJPS2275916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae1fe656b082cf200dacc9908c3b590cd120d0da5d58f6e2518cd16451ec94b. 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/TCJPT2255654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31555aee2f68e45cdd51e218e18c952e5050af386c763f9b3ba115312dbbe0ca. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPT2255656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9654b6eacecf4d92079c7658240c243b3ccb2e69b4847de9d1dde4538c473f1. 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/TCJPT2255658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df006c35f2465cc4c5637fc3ef0ce2441ec61fbc18e1c68dd21c00ce974750. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPT2255659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141309371788343f03ab86121972dd1ab64883c757514abbd7b2ccfb42df49bf. 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/TCJPT2255660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d378074ac5aedffcf23560f192a0b0a6e12d9bbe9d6705f2dc6c53f3fd2f1c. 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/TCJPT2255661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9654b6eacecf4d92079c7658240c243b3ccb2e69b4847de9d1dde4538c473f1. 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/TCJPT2255658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df006c35f2465cc4c5637fc3ef0ce2441ec61fbc18e1c68dd21c00ce974750. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/TCJPT2255659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d378074ac5aedffcf23560f192a0b0a6e12d9bbe9d6705f2dc6c53f3fd2f1c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCJPT2255661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d780df486068cb46770023bf06c5fe9fa9711b3f562923b8a1dc36be7bb0d6c. 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/TCJPV2354890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3694e0bffe672c544345362768c495890f46122a6e7213e2352219495087d. 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/TCJPW2376150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee428eb7c3f0c0a2c5fed637b10be1a7219e8d62ea3e6cda339eedc685d38b86. 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/TCJPW2376156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9645adbd1e6247e6dea414f182a96873c4240ce5c92b3b181e2c4266195a64d7. 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/TCJPW2376158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f1f6b3a3e651f7016160cd6717826297ad235c7136000438f6d995230351f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCJPW2376159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69551ae2bf22fa6bf8063115fc6f0162543e24d700ae68adb27a398e24e51748. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPW2376160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3694e0bffe672c544345362768c495890f46122a6e7213e2352219495087d. 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/TCJPW2376150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54325c3a1517e369522076bfa476b151c3e619536f0ad8b80007882a4c3a6e1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCJPW2376152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1faedfe861536d033ff7ac13ed42f5d59e97ad3b35c81d4e24b674ea641730. 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/TCJPW2376154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee428eb7c3f0c0a2c5fed637b10be1a7219e8d62ea3e6cda339eedc685d38b86. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPW2376156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9645adbd1e6247e6dea414f182a96873c4240ce5c92b3b181e2c4266195a64d7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCJPW2376158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f1f6b3a3e651f7016160cd6717826297ad235c7136000438f6d995230351f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPW2376159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69551ae2bf22fa6bf8063115fc6f0162543e24d700ae68adb27a398e24e51748. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCJPW2376160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6f85aca7639a3c9c72a168bdb5680759d78ff90df0ab462b6c23e89fe53536. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCJPA2479250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceac4518e159473bf67def5cf30ebfea6079166b2ee85ee3a99653ccc5fadbd. 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/TCJPA2479252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387d28a959cc033a1f107a13985a05568ef1f8da3623331dc08a9c7ff554f117. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCJPA2479253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fe96c3f86e1121f7a4336506dbed9933f4e76d4ca1d78a33a49bfe715daa11. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCJPA2479254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880414df4b296b4386213e528cadc4e83c071a8fab15914e78588a699afbc877. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCJPA2479256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387d28a959cc033a1f107a13985a05568ef1f8da3623331dc08a9c7ff554f117. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCJPA2479253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fe96c3f86e1121f7a4336506dbed9933f4e76d4ca1d78a33a49bfe715daa11. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCJPA2479254.