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 0x213b33fcb4cc461e6a3592cfedfd327b6646735937a6d42500d2efd242343f2d. 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/a279732a-aaad-4773-ab55-7b807869e996.json and https://artists.proofprofile.net/proofs/artist/a279732a-aaad-4773-ab55-7b807869e996.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 0xa4de38921c6b3a469cdf7a36ce6260295bfaaa80140f1e432e24ebc6225e8728. 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/TCACN1668600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aebcf38f562ac0abd6cb1ba16577bedff524520f4b33f1085dd00109d51f07. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCACN1668606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42939b7c88940b7efae5d0d91d0a12b0fe56462944b683b96e86b10a926e268e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCADG1782357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a03701ea9a4cb4f1a980edf17c93f77a973847b0af5de1b52b4952cbf4260bc. 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/TCADG1782358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b6ff0ed8c0c71b6c9050b2ff28f09167e34483e8586f00d773538eb004e26a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCADG1782367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc0197fae40385737a29828b03c0ee9def731e926de4dab49fbb3d766f3bd25. 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/TCAEQ2074692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f97cccc23ae6199b88bc95e31728a44acd39b1ff68e785545464dfa2576e191. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAEQ2074698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae2b8c9eead72b57f6beeaa72df76efab5baa0bced25c6441defb50db9de15f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAEQ2074701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91481874fd249eb2c2df596ee7a90d10b12308527f7f1b69eed64d327f9debf. 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/TCAEY2054912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f727c40529747dab20fcd95cddb07dd3dbaa2ff41cbb0002f5dd320df13ef9. 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/TCAGS2377706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06adce50206d7093b96097dd76597c33f0451ac89756e19148920629f16a44f. 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/TCAGS2377708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7e8cf6bcc290f2c00dafaaf183ffe0fa1dcb19d1aead2730320c9bdba6aec4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAGP2238808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dac26de3b561edab896f35a5674a002a722c1156b0b16f55377ba6c50b0167. 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/TCAGS2377716.
The Alley (From "in Search of Darkness, 1990​-​1994")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5afbba40bdd526a712c68d0c71c57a1ac89f464a82936034d9b7dd52c950bcf. 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/TCAJF2526019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bb1d50dab3beb54f544c5c8ede9ac513c0488621769b8338f918a87e917712. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJK2528869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b8ad72a0b6b71d57088987059bea1dbf5a1bf531fa5b9baad88523578dc95. 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/TCAJK2528904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdf60167d04e09850e2e0c07b7702f7290b15f5898ba05cf283c390308e2420. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJK2529726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0993ab0bed087d9804b5e8fa27819489cd68e5145bcf9d48995894c0b640061c. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJK2529775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7266b932e1393da4be8520af17905d959ff1cec69305f5d33a03efc6fcd7a82. 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/TCAJK2529839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83849e106bdaa308c352b3aedff1712a2f80105d83fcb4e4dda899d03af1ca9e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAJK2529844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d9f1f794eba87ffca30006fb9576a0886c06a39e0da9e2d63146b2d88bb907. 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/TCAJK2529911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22058036701a065d557e5e82024250853dfafebf47f4605fce22dcc05b75a00a. 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/TCAJK2529918.