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 0x734a516da9fe7e2125c958a3846b6446ade6def60ecac20b0d43893938260976. 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/fbe81923-4978-4c46-9251-6b6dc0f46a3d.json and https://artists.proofprofile.net/proofs/artist/fbe81923-4978-4c46-9251-6b6dc0f46a3d.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 0xf3ef705635cc691c71769fd525e9f85265020f812945347b4508a9e4f14119dc. 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/QZTPX2375551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1019321b9adfa5ec28e3ee63924f2f4a1eb647b3118a954ff9a5b7c128d30a. 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/QZTVM2291106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e46d9619d95c152d30f3cc71df60335b2e6ca40a53cee6e90d884f4d31d9ec4. 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/QZNJW2244224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a077e77fea70b9a81cb329032839761fe32c760b37624de555d9d25ff63b78. 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/QZTPX2315356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08cb50aefdb7fd02ebba88bb952a13cf83668e74e0538ec8309b5e5e97f8598. 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/QZTVM2365157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e1af530b10280791eb07e82ea349ffedb58e2d62bcd901a729213c7d6916a1. 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/US7VG2309828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e52600515f430b806fe99b436eaa759deb61b0e2cc3a8131f2c1c8b347af56a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZGLM2298201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf9ad8f39f95f3811a81ba9ef48f71865cf87e61363d7111ca46b415f0d51cc. 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/AEA3A2289735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2109ea1d8b4392aa6b7dca80a19dec125c0044e4018d35c815b21e0857bee89f. 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/QZTVM2403285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475513968fe26f0c9f2e84451ea5fbc7a0523be8abcbddab0335de9ecc58ca73. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2412539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0591d0f16ca6f0e305b835c2476102bb80fd35e98549d11038dcaea367d613f. 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/ARF842400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a8e369e2335ed7cfe507baf979634246f3f7bd0806cd708bc18c2f6d3f194. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG2439879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727c724cdcd3fd4f3d05ce97616b7c7433cb5341b725dd0fa89e5ef59d16d76d. 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/US7VG2404099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18f88e0361bea1cbe804aee5d09e6815fb11c0a863198d642c12683826f6e4e. 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/QZW9M2354377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df4cbd7c24a7d7d3dd3caf573181df68aa49db561b8564978dc875b880f73a5. 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/QZTPX2375540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a3b4b2422cc4b3e480c534b3d25851ce1c38b2d1c8f2546c9a9451de9b1967. 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/QZNJW2390904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f962019d007d7f64715b598a2ac876169fb90b5059d33c350760ed48fca224. 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/QZGLS2377404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5249e414d731d27021dbb7d5cdb3653ab0c9dc33bd42bbb62ffc3a98426cc1. 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/QZW9M2221412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50c250054e51b392567e488b588e6d362f983e93489990dd92de377a0d7794. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWW2158158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027547568e3b02301c28073f4a9e3520770aff80e3c45c06e48b4f7b78d1c530. 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/QZK6H2114302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf69b0c5f3aacb50b19e3408e0a43409a97e26d4bb64f26dc1eb9af7cac3926. 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/QZTPX2287465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4633246db7fba9afb861106b4812aef217f36eec8b631ebaf61df775335e1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHZ62245842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca303412304c03981be22b08fc6c0e2bd764f8766e7b8dbaab01b57ce762fd. 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/QZHZ32283722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b3f5b7a5d83a2ecc2de113eab038eacc6cbb19ec1e2cd0c7f22282da450f5. 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/QZ5AB2221405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9657fc366929b72f46ebbbc1c51096d4b2cdf5231e3ce62e837e8e2cf599fa. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJY2019677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b16cdd592f494f8d03dbed6e31e404877b11b606fb0f7e273d3b4e54ca92223. 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/QZNJW2492507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339fa2bca6ff561da105d0453f640688d3dbf0d7d0d5779fd6139fc8fec764fc. 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/QZGLS2503163.