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 0x6a23e21bf87aa95587ffc5a17f76521c53f4384ff580511114d3283a497f79bf. 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/2867b524-e59c-4655-a1db-3667af6e0682.json and https://artists.proofprofile.net/proofs/artist/2867b524-e59c-4655-a1db-3667af6e0682.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 0xb44408d870298d88e430254b31ed29cecfecbe0f546e04621d2915bb54f3668a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DELJ81516828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d2fffd4dc90e5f132d5dc0a234d7734ce86b29f7bee8f7e43e654caaa10e49. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DELJ81515436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3586b1e2b105ba27f8c8ab4192ca94e221e67f4968c5b19d41e5cc3b74bf191. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DELJ81515440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eddb67ead59a46d100571ed60921ad38c563068cccfc0c146ed052f9bce18b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DELJ81515445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3610e46a31db334a76d6e99aa303e1d4a650fc9105c6e9682ee6f45a42515313. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:18Z), 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/DELJ81515450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81304d4ecbcb4d8d9f40a27734cddc972b7259ce07f94949b01191d1700987dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELJ81625067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781d0d5c74374d107f136d57d0e6177f5c10e79d8f37ee4cda760480138e444a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELJ81612357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceffd9a929ddf11190bd1f7c7fd0add0063544f47cf98994e12005e01c3af82. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DETX91500815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72d51e3f71cd15810615d3110b14214c77fcddef34e919187b0e8f218473c6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEWR91700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe9842d620f9902b6073ff7f0dc7427165cffbd637a5aa40f26ed8cdd1797d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:39Z), 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/DELJ81925532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a598f3bb86a208515358b1057ca8b584093832c3c3e6e8e0f993fc24eeb57e2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:28Z), 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/DELJ81942236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc38084f56f40a3d1082fe11715d304243c6d97e5b1f1dc1f593133ed8b9a85. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DELJ81942238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21193c5cd85d393bff65193e798556a6ecbda022930751767a3f295e4b8d779d. 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/DELJ81942240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ded0a42003388c70535c37346334999481ef9c08a6cda9f40a83fea665d137. 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/DELJ81942242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8641e3440c0b53fea0c4259c6e73fa8ea6ef3f6ee86d4782b9e3e35e31dcb626. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DELJ81942248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6add61591588f44570954394c6a7c61e909afa29bb508bc7928f80e8f6ec5a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEQ022111877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a24435beb46dfedce5f4028fa8468c349ee708475036c1849a546887700b9f6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:02Z), 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/CH7812217576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b50ddf6d89358c77c84cf9262bf2363de789891223367cfd1d7cde03f603962. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:39Z), 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/CH7812217582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f32ec2eb8c13c1502ea7fe8446d970e4ac2c067f1b5c9473fdf5a2bcb8e8ef. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH7812223021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7327567e72402e89702be6e654671d1ec0d7d26030deec5bd921b7cda6849f54. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CH7812227341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddf9e137486a2068c80e336073981f4d8eeb8e9c24aa4d871906aab6e9bef8f. 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/CH7812342368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e931e3b3c761b20ca552abe798034b7bbacbaa52df8114ee0d40a16f7b81ea. 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/CH7812342369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd17b6e87484c297ae884cfc21f0e5fbf28e7b178b42b730f437f1d4038e50f8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH7812346802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47b3ed76e1e9067dc3a07d9cd04304c5f0c8d3d45420a9bee060f22e8387be5. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/CH7812351431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1a68275a638b119e02a78357aeac2afb5a51d8c1614d57160aa7b6fafe7d69. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH7812422370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b016c83ac3437c79cf42ac18bbae607d5989ee3b2b6c81944587aaefb9c2b2b. 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/CH7812423992.