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 0x235a917fad5a9072d292488e1288132665f1ad81f03c228876d9f4b629a58cda. 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/a3284ad0-3752-4a7e-83f6-64ea5233125d.json and https://artists.proofprofile.net/proofs/artist/a3284ad0-3752-4a7e-83f6-64ea5233125d.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 0xd50929b32e8c35c176899af3d4d5526084d613e5ee70eb0d379370e2e61bd47b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TR0012200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ce05b466344b9571184c5630187fbc7f46ff1c8670354c92994ce256368a3b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TRCCU2200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f16bbe94eb050cebe9ff980b1ca2542dc9aef095fb75538ffc1e4af0f0cadd. 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/DGA072240912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec34ead76720fba569f460991d5d75a7ff203d6929a6c19ec2589570f1084d5e. 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/TRBEB2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e496534d15823db2c1acab1a77e0f08b0be5715d8bd9b7421ced2593811b61. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TRBEB2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeca3dfe873e800bd8a33afc49e56b8746bf2718429a5cdda6bbc88df698f2ca. 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/TRBEB2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616d1b493680f911a9261dc75c7ab27ded7862e694783ee2d517a7c69032373. 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/TRBEB2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fb9e3a8f24049610d9cbd7332fe8124bcb25ba4438128ba38f495f5b7addb4. 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/TRBEB2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7286609db7c287b26e78f8729b77fe673ea717de36e7f893c58ba78bcf518c6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TRBEB2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3d640201f53ad44dd147fd069aac497647dd9985a5888e3c37147bfdd291c. 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/TRBEB2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d065879917d0b4b2d948d8762abcc17f7b1b4d384353942bc0351058ba1931. 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/TRBEB2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a0c6bf6129f1b8b31053c62f0dd9de3f7c4ebc830040a9adcf32e2a0435472. 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/TRBEB2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0033fc1048f99c0a8850d6da816cccac5edb80d2c22ac794e900fa022bd0001a. 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/TRBEB2200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a3d258b983a8b0121f2f2945fac33581a41873dcdeeff976e1a4ad390c2c63. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRBEB2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d6b074525ee6757d1f45e091a18e19b78c95d897bd03b0f7fe879b2d1f81a7. 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/TRBEB2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247182627f575b6a2f48d955e84d7d0824f1abaaa93c5833aaac6444bdb2f1d9. 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/TRBEB2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeca3dfe873e800bd8a33afc49e56b8746bf2718429a5cdda6bbc88df698f2ca. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TRBEB2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e496534d15823db2c1acab1a77e0f08b0be5715d8bd9b7421ced2593811b61. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TRBEB2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe059fe4ea10c6e1d2e374381cdbbcf377e9ccdf2b713c8399cf910d3df48000. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TRBEB2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec34ead76720fba569f460991d5d75a7ff203d6929a6c19ec2589570f1084d5e. 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/TRBEB2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224b60d8f5be18b5fc79550ebf13a6fbc8e6d472e97d68e32e9d984f00b8a8f5. 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/TRBEB2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ccd210248391c6c7fb4c59bda9d1b1bbe024cd432d909ffc0b461d114e4039. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TRBEB2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822c2cf5d5d295145aa6a47e1a398f826fa8adbe26dd0f1feaf557b3cf13a2d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA062494004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af15dc8c7523acb9e16d31e96082675b9aa91bd61bd19926b426456c25b476e. 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/FRX762205382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b18eb09af54c4b84a22b57c64900b8975efb1b7addf0f8de936d3841cf838d. 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/TRCAE2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0869632f12c0796d689d237c92e7a8406602ca6eb385e4c1065560c1142a3. 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/TRCAE2300042.