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 0x0b859a9f30a1eaf6f6a18849d5bdbb76a5e0cfaa2195d9d370c87ccdeb66c976. 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/f0fb3c46-0e30-43d0-9450-b4dcccb031b5.json and https://artists.proofprofile.net/proofs/artist/f0fb3c46-0e30-43d0-9450-b4dcccb031b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8b549f6bb9a4de5afbf11452598ab6324a9ac6465d2eeb655ffdf18467c0f77a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:02:54Z), 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/USL4R2334986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090386ee524499b2096f866d02fdfbf2acdef87443e5e94606c576ac97020b99. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USL4R2334991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f7dd0efa86f7ea33e8a6b252e31d5e51e918466af3c102411efeafae895889. 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/USL4R2388261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b2fadee034d60cfc602279f38e413fd39625797a2a3351fba77c04f7b042e0. 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/USX9P2301930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ee81e293c45c28aee5563fd7cc9a10122571348235074a7e1fd6c2c4b19be8. 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/USX9P2301931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e49e517c7c08f5ed6e4e6ff241606ec03e47849f382f47c6f46cc878de670. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:08Z), 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/USX9P2301937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a5469d6e9b5466166f3b142fac072b1c1282978d69066c4e5e3b7aa9e8ce73. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USX9P2301938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01ca1633657345875d1d8afc1b8bfbdc53233d83c8efcc10aebd35e5bd32bbb. 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/USX9P2301944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01a5ca6c0e563e81c3598bfc6a06e7d75966992e4aa7a4019033c340cc1ff89. 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/USX9P2301945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc856d05845dad90790146c70555a15789486c5f28ebb63230a355d7349f4a4d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USX9P2301952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5e7dd5bb20a4b2e43fadb1ef93a0d9055c8297c3ed0908fde318dcbf0f3c3b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P2301953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55d3021d4ab0ca2815c024a3be5111304084d00c928c17e4ea87fed696af75. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USX9P2301963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468b3fc0e258b2e9d0ee080ac33822547fafd21164a0b344d30fe2352cb9f79. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P2301964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988eda237bf5361c4505fe679afa06991490eca8ad33ec6d1a88c2b512f731a2. 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/USX9P2301965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8215131754659018ae9218aab40117d556bc0fe832402c717dfc0c8d25801e. 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/USX9P2301966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4103ae60afb2b4fbf2e97121fa74273740da3a140dad35e5f4d9227d8e168. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USX9P2318522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc0b6bbd76aa6878f0e5bcaacd889da8f88d18dcf37a1d20078761d7860f26. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:51:39Z), 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/USX9P2318436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa746cc6ff23cd73bfe619eb85d90f1e0fdd1540baaa4f5a65b2535886ef34b0a. 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/USX9P2329864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b7aedd1c506cfd1c61ea93c3252bdf6e82c8c3eae7e3614696df74b96e994. 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/USX9P2393102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a89bd129c34f87af06a5c2cc527fe75db213e27bcef8085ffba0a972c0f3b2. 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/USX9P2393106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0432aaafee09bc5fa9b96f7904548de9eb76a303ab76b8ce6715c4dbb581de. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USX9P2393173.