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 0xd54538409c881a4ff31b51452b90167ffd807458194b1eb4f393b1e453299a7b. 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/41628d97-2d76-4989-8fb0-ebc028d920eb.json and https://artists.proofprofile.net/proofs/artist/41628d97-2d76-4989-8fb0-ebc028d920eb.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 0x8ed126501d51594e2c17720dd76519abeca5dc32ed8ea9c651f537873789b4ca. 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/DEGC61902118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db57633bd041df9a56775d7b1f48380a7abc5ce245ddb94e2276f2f4557ae57. 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/DEGC61802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6b777b3c996058b62a33f0f02381e7fea6165cf9a2c90ccdc5806e0ba06b03. 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/DEGC61802027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739a68024e70f7221bef8bd5e40cff5858f2ea8a81d0541dfe50d3e8f986b881. 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/DEGC61802028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2f7fe71a8a9a1df7aa814870fb2ca436be85acf3af2877b7cb98c733f49be1. 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/DEGC61802029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebca016f4e86c3984a81994122ae3d8258b7a808e13994fad0d2e1754a982ab. 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/DEGC61802030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf118d7aab034e23c587c8df754638d4a73cf72a1093fd87e43b4ec6037a6d3f3. 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/DEGC61802031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524445c55b8e83bec394a4aa6a7204cb4fd3b84c7322ecd14bb745f966770543. 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/DEGC61802032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742672aca04d477c71cd5ce8f88ea735ba200527dcdb26e2044404313fdd447. 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/DEGC61802033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cc88280d85441c314369a4d1d6533a877b6ae3586dd39ae3f5e7a5ab5da76. 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/DEGC61802034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9fac8588d535b81dec8cce77e986e6b4f0e0aef3711ea977ea24217ad6b0c5. 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/DEGC61802036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5407dec63a4fe137bcb7650c73e97741b1a0da70abd628283f9edadb5d04c7fd. 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/DEGC61802038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408296bb1a22f6d02987c38b94432afd1888745557625dd324820e7f3af81560. 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/US8JA2321003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7080232dac0aa8c57705f35dc383a562e082e559d335c45ab627302fcc0b2284. 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/DEGC62002290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39dbbc72b79f243c56d795795c402916830dae9107446ba370bc253de7d54c3. 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/DEGC62002295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d41bc745d175237d5d27eb451d3ffb9a4ff2e8d36e7e4bfdab0fbfbb29c3387. 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/DEGC62002291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708065aa3fdcee1d619029d80fde26b4c58e1d62a0e8589aeabfaf135cd8d066. 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/DEGC62002299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6e93e07cc5afb86e5cf4b29603ae06671215fc4bcea3d3cdfb6d6356b09be. 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/DEGC62002296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006915f95e095562882c6475eb74a1f2b394608caddc0ac52c8285fab800af00. 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/DEGC62002298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bddf192db4b44d28fcb30e69e001cfa5b629615d8749ae8db42e7c167a04d2. 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/DEGC62002303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b0dfcaa1b70631de3eb1bd0a4aa7e1016c8df83eb655eacec63dbb0d522f49. 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/DEGC62002297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dcce3066d692c031121d2bc0bbe0a85c92248f6ecab9a77ab9f16067352d34. 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/DEGC62002292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6fac130d280ba0f822ef06a4f4156b319d873f1a23eb3d22c12c2c1b1829a8. 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/DEGC62002293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a9da780a4e1fede0df145eccc1d4ebd3c8bc7016511e4742447d680a86cfcb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:10Z), 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/DEGC62002294.