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 0xf1f027684e82cd9de46a713f94d305790d0542e80f4bcf8d356ab21cc89129f4. 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/a69c44bf-fa1e-458a-aed0-2eb32ed5f66d.json and https://artists.proofprofile.net/proofs/artist/a69c44bf-fa1e-458a-aed0-2eb32ed5f66d.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 0xc23cdaa2e6a39180a3528aab27e468ba032b03b46f088563a0debef04328bb4f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/HKUM71300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1fe8403399df802bbac2171954e0caceb39b0647fc74c3b0976c0b1e4e0ef5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:40Z), 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/HKUM71300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd803acc89734e6487823fd352dc3a0a1007b39fd66d320fca977f27b8b0f44c2. 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/HKUM71300336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35804d1043dbf127db48273e1263cda66233237b2213c9025784a7f4134ac7e3. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/HKUM71300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b81d54a73a02e007cae270e76e9b890429c8fe9defde4d6962b6b5e97103aa. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TWA538400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc39b34303e7e66cd90b7ba66a61897fe48d37b2f94db797f658b89ba3ab06. 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/TWA539423103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6674fdca751d3cc09e5ba61bbe4557bf58d352f55d6e70cdfc19a93d81e4e2aa. 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/TWA539483407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0555d25967e76f80b912c5bac5dabf7fffc165b653bdfb82bad15f6490cab451. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TWB519804902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff91e542d202aa60fe2416aa1e8a78034e94fb049fcf4a8934755a2670487ac. 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/TWB510328701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5479b89accffe9cb984b6c2b08b2866549fe6d7fbc6f01d8ae9391642dcb4fe3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWB510328702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8679e0d22dd7e9f2ea301fabf80e3e573fb66ca48f608694a00c465fefadb36. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWB510328602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd43be0c363f5544494b77beed80b23e398f40ea1becb587c0b9e69381f68df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWB510328703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d388f7cebd1fec81539b393c172657695ac9f4aa747bf1e7b862672aff6ef7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWB510328601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da50db3c6eaccdb299c432c8c571b6de79e020ba71609db990c248f97755239. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWB519804910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64585441674d2b78ad9d20269f7047d617ac19067722d8ee5d52901c7218f0e4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWB519601905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abf67754898d7dc6085c55c53ccec8936bbcecbd8de9bfd310ad008cd83a4ea. 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/TWB510328704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce99c9fcad701d5192953306625521ff660af3d1e5406c9dea42b81267dbcc3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWB519704108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c731229b61beb0203721bd584384958a54d9cb1476d8d927fc233141ac02c52. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TWA538400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ea3ad1357cd8a1d714c27439b44689281792c285f6853ec53f655f4ad9641. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TWA538400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aca4dc5fd01ad6fa15c78ebccb19110ba98b1ed686bc3b6c0048fec4952b62. 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/TWA538985503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d0bb685d075b01ad74f86711e1c6b0fdea74171bf7f4c4a15f43d1a197f24c. 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/TWA539336301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df75708da9f8311ee7bb5f1dda98455732ca4553c49e5af391391abbb242eb. 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/TWA531802506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c616db118d1ae1ac3f98c78f52c7a633de5c5fd3065ada8b9786ceaeb98fd59. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TWA531802508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2651e7028551328e9d6525d92fe05896bf22cd793273fca573fd0063b433ee5c. 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/TWA539900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896b8630d566b97c7b084ca5784e7cfb544670699e3f497feede4145895d4a9f. 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/HKI498729110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2651e7028551328e9d6525d92fe05896bf22cd793273fca573fd0063b433ee5c. 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/TWA539900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b9036067ce56a41afd08b55d8f03074d53ae1552a81f5eaf7316946dcec7c6. 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/HKI491500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4acd891b9e573153d3ac117eb159831ff54fea938dd93ef54a645db9b3187d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA538885302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c37847a6a9c5ccb6837aed3946decacf08663e4eaba026bcecbb9c313825e6. 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/HKUM71300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59ae04e7406a2067f7162f5a85f49c15f330fc5b691e0499b126502503af800. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKUM71300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8d06ea427bf12739f12cc16eb31011782a9ea601d28780812992820ed2361. 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/TWA458500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59ae04e7406a2067f7162f5a85f49c15f330fc5b691e0499b126502503af800. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKUM71300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8d06ea427bf12739f12cc16eb31011782a9ea601d28780812992820ed2361. 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/TWA458500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218361b4765ed2160587aada6a8c8284978d2a5ed42fce4dc07a794476a4d70. 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/TWA750601606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654049ca145f8e61bbbf9f4af0e70ad6402f512b6694430be6b6877ac42b71ca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA538907907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1f0b48b55b62c519506c7466ceab77c9b69225d9be389a74fbf01478e842d6. 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/TWB510538201.