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 0xdb35b36db94ee027eea566180dcc07ac6548a14231e599e0b2cfa55587b51c13. 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/291beac7-4c5b-44a8-9bc6-b8b18cb8984e.json and https://artists.proofprofile.net/proofs/artist/291beac7-4c5b-44a8-9bc6-b8b18cb8984e.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 0x4dbaa214fea346a8576b50d213e3ddc116742016278a864c31afa4f2b1759da4. 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/FR59R2086889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc4dfb226c2d82b71768e8b528fdf988b5b2ca8122fed1f0794d684ff8ebc4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR59R2086891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4b944591f5106474e11469b32ccded65059ef2babe988e635db4a5ab59b51b. 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/FR59R2086895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118f5d546e1efa34796fcd54667bf557e615cde52b04b61e6a03d3534cb8b3f2. 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/FR59R2086897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef88197cde047f7847cd7f15641730becd62c0624c2d84050599af46768d4f0. 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/FR59R2086899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bfaa1770d38ad38c208b471342dd883b359f0fd32f77bfedf395bdc998456b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:18:38Z), 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/FR59R2086890.
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 0x194af2d8ed2908f3852e0dcaa7aa256807beb03d48e9a6ff3e8c2af4fc275789. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR59R2086893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22810df308d3a91f4e1a57fa19848ca798616a9c707433024b3ef25e354b2737. 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/TCAEQ2032126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82c4194dec704d74ae80952c7c44c45bfbc4d884bb3b9609f6c3d7a3b68c4e. 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/TCAEQ2032131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcb8b10b83ebc6b739d10adc2d0fd6a59994ee90872d10728a8368cec341972. 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/TCAEQ2032137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13172e5c273a5a17c6de005ff8d2c2bb02f684b83e3aeaf3a8e8d19ea234a460. 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/TCAEQ2032148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c00dc24673fbcfb58a17116bcc9e61baa4f36cdf26c7edcc769f2914747db7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAEQ2032151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb8646fa32b4737463358abae5ce3eee6a56e9153fa6b711e945147bdc5a765. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAEQ2032153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11119ac5692a272be41de36da195ad9bcd5974faebebfd2f2b3b3e6004109844. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAEQ2032157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033a7090eb7d9d055704e896b6444e32ffe46eae116faf710dadef7f4830dc4f. 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/CA5KR0008200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf481ba087c5421aa3df7a2e97a7ebb97025a4df5dea85bed1942d21ff68d020. 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/QZK6P2149580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e243477bfad19c8abbe716da2d6710f9af49d94aa74e0c8b3ebe046a53565fd. 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/QZX882411939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3346c9f1c0e50db29cee42174894af204f4b5e7d5f704ea77d8a0857291f75ae. 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/FRX202364271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a2aa206b8a72ff6f3d27b4f551bca70d1be2821df9b805da45d6277653c81. 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/FRX282006005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f107b16b00d2090f3136af2cc4ebb11b04c04dda18de102b2f10ecf98696d. 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/CA5KR2215277.