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 0x09ad17e6644492bffdc2ec6b07e17bebb25e860294fcc18a00eaebbe38e21344. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb14428f-ffc0-41da-aa7e-5676c5446d24.json and https://artists.proofprofile.net/proofs/artist/cb14428f-ffc0-41da-aa7e-5676c5446d24.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 0xe479c053715af9b1f10502d1de33fe21eb35dee8339bdbe2698351f092c5af3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2470156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9ed7efa3318e93442f3f5967e6bac841fc40ea7ce11edd87ec728b5c100d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2458875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf7a111216468c0317c05dfa8ea2ac40c5a2ac87e476ca23d96925dd8701bc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2431777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4847961fe93b8fc3ff673c565e5233a9ce2492dcb3161a6f267128c0a2078e59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUMEV2418943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16839c75467388bdf6b576c367cf5e372bb98453172cb6023c562aa445856e1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2396303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a870d6b9c2002709cf28653bd1c6d6e077997b3a72fb534730f050b5b8851. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2396251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43cc8957e5f589df4cd1fc683b829ee4c28e31f8a6b66935db8b3047073cbb1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2375289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7022c60f7f9e56e44618c716a6bcd773b0b17b9eb64f40c1555deca00b186eb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2329685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e4af3c44483359eedfb2eef4cc28034acb48b80bcb1a7728bf167d015f4404. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUGBT2231909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d6b7b855a74a965c626f8e80bbebb41ab07ad61cd66e56cd616eba26dc412. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUGBT2218761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ceb7dba0aeca4652578d478e4509d1e4c1b9ca8a619eab099a0a5072f96ab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2287077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979020975eb62d95486e2777d8643d5b17321dc59b98db682cdd0c50142eeed8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2243640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba71e4a36e02ad6e404dd84fe43204f25de0a3ecd2fac5107d0db60ffe7f3b7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2223420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962336a11c2f8026df2d43312d1e48af61fa429b0137d231d06ac674f1f166d1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2218492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3d8d6f61880461d1ef6e4f9eb2833af8f065abb21a1bd65ac2524f0f2b101f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2293574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3dff4798274dbe210fcfe07e256aa249a1d60ff669b637f8b4cef2a19d43bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2151332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0742d26f17772a34d4714b71f6a9a975eb0617578c359e9fc650478a67cea320. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2151329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9411e07657020b5651cd0bcc0149493b6f30b2f0e358dee3157917b041ef1d7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2143135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0365231301cec6458007435d33714d346e23f2d499b578571dae525b83eb3e43. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2137756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d9b7263df86cf8361ad0a855ae72c76d154ba29280d67cd15e3494186d911f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2134054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115211be45719b48535d529a808af9508450a8417efef71756c8cf9dc2771e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2131257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815e1a48dcd56c422e50ac3e7938af7aeaa19fedea172435341398f17aa78574. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2023932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cffda4dde289d1d1763e769a7ec98e6607759c9be730e2c575b2b7b639b83c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2021221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70debd3a0655a3c04e10b6362987ff07cf108aaf4b3d966b60a19819f5f774e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2020172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bf248a3c4f0d1fef0053b0545d09eb368ca3c2a35281ba2a60eda92ec992a8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2018845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126752f7793fe2e0762ecc4c89bf1335cc7bc7bd216d4d13c145d29904c7b60a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2004917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d55df959a79e7eaaba4d8b0a254a86f36752fac5f33652e41a07ad9bb74e613. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2001179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1d9f8f516a12cf0c3d2d2f9e464e975d689e5f0991cb7cee472dbdde46f062. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S1925995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794ff4c6ac26907d1a6bfc68d9174fc9a653f51cbabbc551f81a55b0616517ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1925988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e08ca843c9267311c704dc82bf5364be5334367d1ad777ee179a40e99d8ee93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1922185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484c9619b1e772dc456791fb1cbc0c4cd6fcd53ea4f9f9169b3ad6e99e3b0b4d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S1922186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3177618d477a8712100a4fdb6761edaebc58d6dfc2e810af2f8446512c76b299. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S1922187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b9260753499d7c8735a66a5c352dddd8c2068f10afb22e5662e963f5f43ab9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1922188.