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 0x22242d4c84e9f64e4b6656c530e2494d867af1942d8fb47c3866af41f16d9353. 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/90a138ed-c24d-4a8c-ae53-f10e1b4aeb54.json and https://artists.proofprofile.net/proofs/artist/90a138ed-c24d-4a8c-ae53-f10e1b4aeb54.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 0x3c639e48581d958bd57572cbdd4b5933f13c3b94e6f10dd1a459cd45846f7f8f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USTCF1099246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daf508856d55918cb1d4d3f8f2e5290718c41390ec15b18c49fb50e88475b1c. 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/USTCG1000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b6c1df179cc496c468ec0e4ee8f08f8c0c6d623ba7a09b280e66649748ea62. 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/USTCG1000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccd05598bb6301c2437617b3c65b638ae6b9c7c941ff429388f19e9fc95b6bd. 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/USTCG1000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073d3d5d61a4f598f34231fe05a9d5b7e14e0b6e4d7beab9e7a59ded12437f2c. 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/USTCG1010127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e3316380d57cb89805e606797a54efc386bc8e66cc1cb7663121c6cbbf6b55. 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/USTCG1014402.
Autumn Leaves - Instrumental Tribute to the Great American Songbook
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae3be0a13fa13fc5a926e4275260212ed44b0f1e0d7197c47460131495f87d8. 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/QZDA81869126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f9cff07eae928c532299c35e2bb5ecfc02414beb9869677b71547113a3bcb3. 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/QZDA81869130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663e8d50d16e4362398fea84d4dfb572c4c9ea605e06b40d7967d51c612ce8d. 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/TCAEZ2013073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c30a765349ede8d186530ba8647c2e49a17e11f13b07d7937acd8f440e73e2b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEX2083516.
Classical Spanish Guitar Instrumental Relaxation
Two Guitars (Romantic Love Songs from the 70s)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38ce007989ec06669213c41f2b982b9de65417869d464cee0fa69cfdc24f80. 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/TCAFT2188231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0ada180aadbeca68407b58e55f4e033228e01d27fe5e3200bf70bde026b6e1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAFT2188236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed1202479e4f197c9a5983f4301e5f16de30b7a351dfce7c9a13d9168859500. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFT2188246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929bfe0707eade6d231cdde87b8fba7b4b4b9496437e9ad357f1e22fa76c5cb0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAFT2188261.
What You Won't Do for Love (Bobby Caldwell Tribute) [Instrumental Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6066c4371dd700ec689159dd51572f1e0a8e87a3bfb2c81b5042607e4ad792c6. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCAHH2374191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488fa9bc248b34ac16597431e74704e11fc2c745600c2d4e04f22f4963f747ca. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/TCAHH2374435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6083aa75f2deeb6ddb95694a5dbbac0680d78fa287e71559b92e261dc735510. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/TCAHH2374393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96b5b319ec92126d6afcee9aa8a080b5d31610e599166fa6ac891a92c4d4ec. 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/TCAHH2374423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff661d33c6aeed365b1ef74fd8904c6a02b57988a5acb390c415f543c2d8f395. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAJM2583711.