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 0x2ec0b9cd4313286cafab81ff370511e220162aa3b63756af0e50e458f19c497a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e01c3c8e-49e4-43a1-93fc-bece9a2a6c66.json and https://artists.proofprofile.net/proofs/artist/e01c3c8e-49e4-43a1-93fc-bece9a2a6c66.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 0xbde6bbdec9f4b2265c46a206b0ee481d2e3740d806da27a938aeea0dca9996ad. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHT2314543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2054112bc4fbe465b1999a037d1d3831ea08cb3000b70e7f67bcdd69f6ce6dc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHT2314597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b557e226644b84405687033e04b1b64c5a911c79e32ac426d01ecd0359f4e83. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAHT2314371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c4ba7ca3bd2c2e7e30888d9c69b3bfaec2669d5f3cdc871379e9923130bcc. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAHT2314455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c4462b00e53d2bf91f2cec4af3b898c63621e78ab02c19d22561f492afabcb. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAHT2314648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8972ac3efe3446591e18051ffef6c0c54ab484b3d92a089dfc5f81162facb320. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHT2314516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab947056c86875a42d86cadbcb839f4c7564936341cf6448fb0033ea5cc596. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAHT2314474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63c76ff84a7e646991b886e415599c29dfdca5468116f22ddda90730ac1c37. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAHT2314693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1c259a43282d0dfca12055ec96d02c28e16dfcc41e809a8d3d1cf25d580ead. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAHT2314626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c36c8ecfc795c775b269f931cf04c440e237a778412c9c1ce1aa37e1cf4f6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAHT2314577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c8c275d748a9b63270cd8237bbd7e7a23093666196757fc9ed909770cc459. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAHT2314430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41729004c794082735a61afa94f401967e2d67e267fd46a3a6cfed785c3050ad. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAHT2314496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8a20c821f2f24e179da10b8cb856496ed2ca294e8f4fc9188a78f6340f915. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:58:12Z), 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/TCAHU2467336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e8823889d646509baf10b6524c0e51fc1d2ef006c0d413694dcefb8eb8e42b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAIQ2470188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e214f3d12016175cb0e37cf9c68f7335d22a9a2a03a6d055f6e3ed6848bbc6a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIP2470146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e491a2f5b0cbff890fcdf640de123a88b9e83972e6e0cbe40aced17df9e550. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAIQ2470217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3eaf6cae4285dbe178ee9e2b32b50382885f178e0697b92c8f031be2e7c8b0. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAIU2427258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2bc2605e03df45d45d7bc15076920c6e052d5d4c8db6d6aa9e57438cf78e1c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:24Z), 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/TCAIT2427210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8149850f9d68dff2cbd227ca283fdb4cf0942872098d5f90c9299c26709e5f. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCAIU2427292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33fcd16205de86eb9be3ef3428f4a22be6250cd532fcc1a31e9eb4671ec903f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:18Z), 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/GX38U2516029.