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 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 0x15949c4a59794fa7a738bcb1f491d7308436e29a6e700bcd46fab52845fd79c3. 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/384666eb-191f-4e81-88df-54113dbfe268.json and https://artists.proofprofile.net/proofs/artist/384666eb-191f-4e81-88df-54113dbfe268.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 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 0x3a946aec0e07c34a494e27e55015783ef575cb171ec00435d826de64dad34ef2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL1011127380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e122930290958aca77390bef98d3c41445fc449878b76ab18db51deb0840a35. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL1380601092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ab5030395ee33479d7608f823153460cb33daee436de0cf303ff2087e62b06. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/IL1380601101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7333d0f0c3a678aee5bc3832959fa7420b5fe33ce88c3048bcbbc6721afcafa. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/IL1380601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3b6c4d066141e0041b657d46dcc38ea97e0775141311f8d3bc1dd5730fdfc6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL1380601104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c934a9b7932550e64a2f21fb44e7fffdfe0b8dba0da74a8e7926b4c9adacf. 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/IL1380601224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3e077338fe91bbdcdcee3eb65a9fe7a5fb61f789de7100f1f12cb765c39e76. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/IL1380601222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da03e94ec699e2cf836de1b326071ad3764eb45902909f74e7b9a7baa3c69fc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/IL1380601216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790ed04b4d25429cc3ceacc50c28db252ac276b0b9f0cea221ff6db3059f505d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL5841720197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871858faf87ccedea985e7c485f4e822dcffafdb0d0eb64825599f46f4c15476. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL5841720198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca374b63bb6faddf31ac83d57f7dde9983bc549d90b554a87bc54977e0475437. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL5841720199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4b3aba2c80793fcb29d3443dca52787ba204e9116cc9aa46d5fc9f41a67ab9. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/IL5841720202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37c01331cf6af5d3ea4d10ae7225890551cb407e008c95617216eb2918dcb3a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IL5841720204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346354058d9ecf4b3c3be6164f236630d08b053c0be2987110e3ffcf70a04c17. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL5841720206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd101c46439ba286e4cfdf378bb25a3b3de4e2e191bdc297b1d98137915a7738. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/IL5841720207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af4fdef097762a5917355eb6e4077b6cb2e666eb4ffa4fe846bab670e64bca. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/IL5841720208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0fc0491ea2fce4098945dba925c7148d50419c78aad9f95e37be1d3d7ae453. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/IL5841720459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb5f31e2df44287db7636c03bfdd7a449cee05ae23534c00aa58e21549c796e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/IL5842340467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b75e3d1cac461afde808918c9edb4bbfbef792dcc51c39bb8542b5f63f8e4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/IL5842340468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6c4be4f29b5a1949aec90af69561b83f066dee353a26c0b23d236b8e45b14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL5842340469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6ea2e16edf34dc755a8c91bb55c380644db2d9dee86591325e40ad6186ba36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL5842340470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c045c9be52af725bb76a4c2084a823107edc09fe5397fafff097a593b8294f3. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/IL5842340471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a52460485ccc1b34780498fbfc0b1e5fa2230557d977182598306a97d8dd1b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL5842340473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e134e2fc5e96681b7b1d876752b849326ab86e2e7a16424fac333faaa13ced4. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/IL5842340474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985094c5ab1379ef8ada04697e89ab43fb2e64a48ac35b3b2c3475725a71c1a3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/IL5842340476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14c623066573ccaedb73594ee98d7175545b3ca95dcad2493285e9f9e0da526. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL5842340478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41e31167517988bb307e45fcc70853f3a7023341784a252e87dcede65d6b618. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/IL5842340479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bd631c001ceae605902aecda43bf1c20ce051763b0321704f0a5b7e1c141cc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL5842446698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80537c1a8b99b182e602c93ef4f661bbf6bb16c01ee96204ae1b880b8dac6265. 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/IL1011122767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99571c82b19ea1b9e8fe81ef2e11bdaf4e807b0765499a40294946e62891a6d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/IL1011127377.