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 0xe6881fc36c1c2ac1c23c7bd5f853ded1aa5bcf1aed0b16b35195158d774d108c. 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/0c6514dc-80c7-417b-9ced-0f32b72f00d1.json and https://artists.proofprofile.net/proofs/artist/0c6514dc-80c7-417b-9ced-0f32b72f00d1.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 0x0a458e310bb908b26ba8552bf8ea542ccb86ed3a993ebc0dcf514a285c96a7c7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USL4Q2288474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2740a174a56632218b0d9d50f5b925203b3c46f3df52a3299da5f83a19646be4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:38Z), 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/USL4Q2288475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba87d34cc288d7e9000235fd340ca265451eea642cc00a1785f7c7bd99f40d9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:49:16Z), 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/USL4Q2288476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec30d6580e74137730f31720e4ed7bf40ad90b36256c6723aaec6aabcd45ac. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:46:21Z), 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/USL4Q2288477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf453a4dfd2642792ad276670939f111e6bcbb5fc292d7cbe6cdf689ba4507da3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USL4Q2288478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af71d4b9eb0e3242b24a17318e37a208a3119af92dca19ae29218d25f7bafe6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2351696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3474effeb840a44dac68f51ba93b8e39b2f77193950f4c933bdabad532bc35e4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2351702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a04ef0f774200011ab280ef130a3d32c7bbfa42a058dcbf1c9a6b0cc7749d39. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMH92369342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc492f9965c5b97e518578a06ce3be0a44f91101184aedd0ef5bb4294675966. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5557dd44a9926376f95399b106232fe5e34f3ed0b910e067274003c4e01e1886. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd49074fdad754d89367ec913df5b83b30faaab6f79a54857d92605103b37fc. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USL4Q2300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151cbf68ad2e0838af5af472928fb51406d246e3d8f20bdefd16880e8794fc0f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2372112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503bafc15a85be9644ee22517e7937b2ca43cb93f56f5e9cb639d9f60adb5e82. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH2417597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0118e5cb98a2fff61553f75a14019de9d265b818be7ae7444bfa772ceafaff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH2417601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7f9991c134832e07da1c46c315fe826b05c6ee76be9b1ed1a043e5f78c80f6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGH2417603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ba9a5011dd64b88a471ccb0a7ff8a43a15cd6ad98cb7ce199ae5d6ae9ac41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH2417604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c685cc156780a899c37e649baeb22f8424fbf5ee40d2497b3d38a8d3bb89a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2417607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9488b81e1dd4f762e110cc893ca57377972eff03246286c8e09efcccb046f1c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM22469949.
I Should Keep My Eyes Open [Extended Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aabae80cbdac1949740e0ece25f5c04faf736717985f82ac8d6306a91f858ac. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM22498390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ef9af75012dc67c9ce9286667b8d042572e4e2add17ae291ba136ec6482538. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM92455092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d76cd91d0e70df199143c2f64dad282b24a11a23e6575f022edc724daa93bf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q1703960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ad72cad04e1ff3ab7e81f58b9ed447f50351fe591bea58eff2d6033686f8d6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM92478455.