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 0xa071fff8aad657a4d7bf71483c930849880a36f2617724d1a763adba14b77945. 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/2202394e-50a3-4179-b8e6-a0d11cf91f6e.json and https://artists.proofprofile.net/proofs/artist/2202394e-50a3-4179-b8e6-a0d11cf91f6e.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 0x9de7e4aeff7dbd282413019c631ff75cbaa02ecb4a385f68f9ea993dc8467d1a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BK0R32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb78aa241799d4e4b50167ab26e0949ffa4570643b4d2e05322f5e95b178e44. 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/BK0R32400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aa9e1af227c6645f5dc9b200dd52dab1df06f0e4dcd7a260ebe9fbae8083b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCAP02400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8375e3cb11c1350a63b9a48b990a2e213707f798424fed48115435d1e0e502. 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/BRHUX2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e7ab769bb169ff4e2a7614a85f4ae23789d4715de3bcccce147f82c308ac4d. 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/QZNJX2314876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c121d37fb8c283f737a355e36d39b00e4fc7f66f87af79d317c7d70753eaccb. 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/BRHUX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae6114116d3bf165dcce8d092fd0570ad88213dc4a67349925120850d8d4e55. 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/BRHUX2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b9c7824e99534325fb7716bc0ff1a2427208eddf88bd28f61dcb890363760. 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/BRHUX2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ca168d54fb489037dec5d63d0f914f0652a6dd531de4d7ef4ea4cdcd58cc50. 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/BRHUX2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8773dbd03d3d6eadaea97685e40f3375192423a280c58b0793cd1e818054cff4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRHUX2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c44a4b730f1b8f01f3774eb286e8eeace8764576c1cc634cf0b0f5f9df7b544. 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/BRHUX2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75490c093b4af12f05133488fe5c24b9619e0119c266b87d8cfdea5e06a101bd. 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/BRHUX2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9071b48bf5e707b57d380228356a161ed9b44ec5afe216707bac6a9b2a4cc2. 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/BRHUX2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a7838efc6d11c77e25c17bbe19d77baf1b60ca22af431667c6035a0db37ceb. 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/BRHUX2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae40a0d8b526f542d7fca2ef69cf4ced268c1e2b19dc195a3a46538f5b42a20c. 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/BRHUX2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8d4731c1d8666b4c3b641e227548f488c5524595bfb8d18c586f5b6677e2c2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRHUX2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37de5ae30e3ecf8a25b730f27b21d1dc7af4a3b908e38a5360001051b7a5f56c. 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/BRD1E2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d81056ea0b5d9c8046e72fdb0eff6a083a1309a3ac7dd2e766b204ccb66031. 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/BRD1E2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea2aeee82be7369715c4b84d1b2e5b8ed9c162b08b2ae730074eb7686b44bbd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR9PR2000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fc1f71742b32ff01ad2f96928e064383302ea09f23f6969739894511826e02. 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/BCA5Z2000010.