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 0x106f55d30cf5be79270dbe75d0555b363a9e2cdf780463d188266b52cf6cbe85. 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/bcdad2ea-f599-45bc-865e-e8deb4c1c06b.json and https://artists.proofprofile.net/proofs/artist/bcdad2ea-f599-45bc-865e-e8deb4c1c06b.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 0x0ace95525580523561895f5255061d38872ac4a4a19bf39331e5107205ecd942. 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/RUA1D1912218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd5a8eb351b8554da6a7263362565086bbc13bab7bc2f4257bbbde7e9d809e3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/RUA1D1912222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a9c0ea1230583b2fbea0cc7d3ca5cdb945a28d9dd97c099a03fe5f1c5372cc. 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/RUA1D1912224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05969c7a02e32404ff832fa6a1e7d4a75faea7dac41c1c0020c43fad09723f56. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/RUA1D1912213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bd2d76901bb5cd5869f50384faf78e18b20263399fbe8420358ef3b99075a3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RUA1D1912216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14fb610f03e24d1a3af1a4a1889ba25aa2c1c8c7fcb8d7cd1f46825496841b2. 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/RUA1D1913129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c30cebcd1856a8e4cf8111b194e34bdbe8060628c5f9ca1e5b23936e318941. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/RUA1D1913135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86486c4efc119edfa03e4588dc10e904d9fa3e39a1d03f63820195396513cb6e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUA1D1913125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c40e48c48c91d24966da10e00ea38806697ae57d6ee29fda6852a5edeadad3d. 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/RUA1D1913121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fbc6a3dec9ab63b4ade12c809e89202e65215d12c2940778ae8f3974f56d8a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/RUA1D1913122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9a94c6155601d89213072de3f1093e55379729bce331b92e1cb10d576156fc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/RUA1D1912674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e751bf83899255953f06e75d978879a0f6e8e18fed4ad54398c9bf2b95ae5c8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/RUA1D1912678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89acde9822128ea2b013168f19785652a04399115318eb3162b407a6ff3d9015. 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/RUA1D1912175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73816748a78a02326001fa3c2556210efc47612d3d4d8a4c22e108786473429. 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/RUA1D2017225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dacf09a925a809737a5451ff042c1899e5f01b7f69206e8667242d0663aa0e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/RUA1D2017227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba0a955c29ebae7869f2dda3f5cefc3e4f08147b1359d5b4bc6bc643d47c08d. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/FRX872204623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810b318c3c32f44fa277ee1854dee0486b1bd9a6104311184ca714dac77b97b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAGT2464346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f71e5c9b50f32185970cf16d80fe9b7fa6a3cc17b391097897c18dbd16ad0. 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/RUAGT2464347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6aae4e3e1025c88926f750d151475cd49f986496879b4e99b3a3a69ea3ffec. 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/RUAGT2464348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68a4c341f059bd1c18e0f5a3509017d04c3a04cc650dc9a3b84cf1adbff8bb6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/RUAGT2464349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48012ce4ca1b25c966925bab479d6cbdfb3b18d151cb60291e1ac02416f4ad4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/RUAGT2464350.