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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b3eb9d1e8e71372c43b73d54b525b90cb159b0d04fbba7caba7739bb7a0259. 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/e17a90a3-03a0-4c07-b224-ea20a1642bf2.json and https://artists.proofprofile.net/proofs/artist/e17a90a3-03a0-4c07-b224-ea20a1642bf2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef461e27f94336f071365309c9a2b4ef1dcc83a382dabe346a47be6fe600b8b8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:25Z), 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/TCACX1717040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402973bad2098351d689dc46b5da83034cdecaf3f6e9407fa35d1f13a7bfbb3d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCACX1717041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6861835f23737bb5aaa42fa6959b9066b70c2c30c983d74bc7b96dbdfea12743. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCACX1717042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3474d597a04902b1a7006d95d39fedbbea88e88e23cd186c63a7587c6f42e660. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCACX1717044.
The Shepherds of the Mountains and Plains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fdaef02d2dac5a7d727f7b144afc2d28f4ce9eb9e78738e8bc21f1a93fcb1b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCACX1717046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60154212131a9e9b0148f5fe62863629a1a4536a48ed9e2ac8ab78f13a1af5a. 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/TCACX1717049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fd3f7d212f2b284c2cb36b1ec3dd5fad5b3f51291634c2fdf7049b21d93870. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/TCAFH2067896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8d8385cb590613fdbc7ad25899c4910df571dfde814dbb8bf93cae005a20d4. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCAFH2067905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449eea2eaf48007875b66e1cf43ea63a5a507100a6de440d5fdf4ab67ead5fb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAFH2067907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6e46c4d74a5ecee851ed5523b538f324b148ad39a07c73a2980fd1b6f6f66. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/TCAFH2067940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4002669e0cc4860202454feed04341f9dd322268de09baac0412447d49d70c8. 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/TCAFS2133914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2b8a03183124ffe5100b8279ed44a4f135271b86813fe341d564c34ce7831b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGG2285311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342d764821f4971c0085324bec691a1da4360b0c339c9426e27b372e48c6638. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:23Z), 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/TCAHT2308720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31bc91e82e6b491f385be35c4b6e6a093fae25665ba5a63ccdb05c9185b92de. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHU2418947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a16a4184a6a9cec51ba68f5b502d07e571ddd4578249b76f3a116174bdd0693. 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/TCAHU2418952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47776e4755a3a05eade32306348971139ea4f5251cefc9bc2038ff399add52c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ATN262535604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca09ee9f4c77f9b268402bbadb75155562d982bda7dc2756dad6586e8908730. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAER2055122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc538bf0a187e101bf7faaa09b0adf0babac8a0e989772a5b22f8bf796e5bec36. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAFO2139449.
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