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 0x6c81fc6a6771362baae17b28a8505d8e7508218fae31b26948a97581b2be222b. 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/2cc67392-4eb0-4828-9608-3a2567aa7618.json and https://artists.proofprofile.net/proofs/artist/2cc67392-4eb0-4828-9608-3a2567aa7618.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 0xec33f5fa8c5a09bb689ac440d1e7af33336c0fb53f60c8d88f9d816205627bef. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZPJ32133145.
Toss a Coin to Your Witcher (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558c91021673595df9f5dff49b1289e8579d024219674b933cbd3c5b259f58a. 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/GBSMU8445259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b129acb77850c01bd16df80c41889955648752e299d3c4a86905cd71a34230b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBSMU8445261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4a3c5ce869e05b49c4eb252bad0a3bc13665a8477360123a2552d361ba1011. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GX5MY2213864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741a8bb621bca63751f6fb534f67eb1e743e061ecb7d998712e15b514d9fa7c6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBSMU0126060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b513b18d1a72305381bb3649a60ee7808c4fc7819841ab6a3e7cdc12a68760b. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/GX8LD2238639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7ab1a7c0b562acdedfba584d7fdeb8e8bc99f8803d2e060f517bc8ec52ff5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GX8LD2271696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3322c3eaaf80164c51d2929af3f33993fad1eb7d67c1cf0d2f9a2caed9945. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GX8LE2262194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5576a83d530a2e3175c6cdfd3ccaa62b52c8ca8a6b30a51125ad159061471d6f. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GX3HH2496876.
Concerto No. 3 in D Minor, BWV 974 II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91821e577e46c4ce78178680f0de81252bb36084670a8a20bf71835f49f52d5e. 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/GX38U2320930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea99da935f73926c089712bbfbad9112a01d1cee31de2fc8f29385f102afd7. 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/QZYD92501776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0962621102c42e88fe318503fdb131b117331c246b7fc5b066bb4899eff0b6d1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GX8LE2451835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d69c63b7888956e748a712c6891df19825704b78c5f8e428a65e88d906168b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX5MY2475164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781493afba5d89b877619da75dd367a1d61bc35ebc56e64f7ceea71a2d41221d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GX8LE2573720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699770af22e5898c2cb136934d6b1447a7c2261251d6d439c0ad1adbd76c4f0f. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GX38U2555969.