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 0x92dddaba6eae9ba365ead597a786a2bc222388cb41f90a1a254925abb3f0c326. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d56d8ca5-c9a0-435f-b7f4-01ce0beeccbb.json and https://artists.proofprofile.net/proofs/artist/d56d8ca5-c9a0-435f-b7f4-01ce0beeccbb.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 0x33337ae0290e9875855990e92494be9a4c816785e3d72751ca14092ce634f8cf. 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/QZK6L2450109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa914d2e0690205825e6431920b5faf2cf96287d6dc9fedea83f650affaa29fd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6L2450110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c2aa58b928e18353e822f99fd86eab9375c0aed13ddf6c49ebb2b1cec3336d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6L2450111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf537122e617fdb1f5da1f605d180a9740561c078b0ec85e64b3b7285dc23ff64. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6L2450112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf92ea941ea0c808c8980ea906aef53f11a096b82d08fe3cb4f9c5a1edddec69. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6L2450113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782053cb634ddc3a6ea3a562813319d232a7f4a1dadd2b509345dd7c9945122. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6L2450114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5f70c89f14994bd00aa5ed46cfb34f07385be342bdc447ebee256e203cb34. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZK6L2450115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d922f20aa9efd4f12232f486e8e137e20c5c2634ceadf1340f2b25f9565ab2d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6Q2482890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf016d2a19b33848b629856f672f3c8aec036d99062aebb71ce5a9d2b0dc9259a. 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/QZFZ22391267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32121e38ab9b9fb59b73020bc2438bc72e56464bbe95cd2b1436eddcb1db3335. 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/QZFZ22391268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301924471587b2a4a0876b48d2cc81534f1a1bb20a147245500127ff331af5b. 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/QZFZ22391269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ce6ddd956822b457ff9c7c861a1044ba1a4bbd1964c3c3881a144d1825eb26. 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/QZFZ22391270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a12dee5d7f67ae4fb1fc071b892485dc9d815d8b0316960133c805ff6eff9e0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFZ22391271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e5f87ad02c1b3a5f724f53ce08e8166f467f71c1162b4572f500deaa9102ec. 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/QZFZ22391272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a47983463e485ec51586a9f29913f6ae9622e40f9f0dfa0e281151ea737a0. 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/QZFZ22391273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f5c9518e5cf18deba386edf9d29893b2bb69466f8d03546ef40d91c9b9bfab. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZFZ22391266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6b5182f161b5ff36838d1efe936703777010536e11db71142877e21f356948. 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/QZNWS2317435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b54e4284a66e6af598da1437f6068fb979d02a2e947399e012b6d394fca8fc. 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/QZNWS2317436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe88d45fe4e247e89ad6411dcba104f6b844aafe95d2b64e0ffe1b35ad7a68c. 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/QZFYX2166993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d43beb4f9b7d24b70e7b5c5d19d98bf9e90e494bd11b375a1dd0752bd6200d. 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/QZHN52307772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef3f314db7006d7e8b0d30768fd781656342c03ec9fe89dbd66c2a4e94c95c. 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/QZHN72367918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d43beb4f9b7d24b70e7b5c5d19d98bf9e90e494bd11b375a1dd0752bd6200d. 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/QZHN52307772.