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 0xf010397bfee225fc4f11f71c017dde75d0b159853b7e2a5b0e06c7b5f8bebe8a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb040771-0826-4da8-96f3-fe56b5df4379.json and https://artists.proofprofile.net/proofs/artist/eb040771-0826-4da8-96f3-fe56b5df4379.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 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 0x27ed13c21da18c8efefd8f77e95db32ebe3b5f9b3f568c876f56d8271a1096a3. 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/US2BR9701404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ace506ce79c05d40d9d661d19b67189d79e6cd55b3b6faeae3a9a398b1c47e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US2BR9701471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd15d01d0a1bfd9918a40d18b0633db93a085e6312900b1ac67c6e610175df9c. 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/US2BR9701472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953801096a31fbe04c7492ae3b2728974c49836facea6c0e474c19611b3c7216. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US2BR9701473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d00755a4e40bb1a94ed172079060f092f8d54cac5eca0b456e7a16513691ee3. 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/US2BR9701474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc3514d10104344f86d5715cb77ef74e6fc214c0d724b4bd51fe49a2724065. 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/US2BR9701475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf653953c08244735e8d60103adf93892684b3008d886ce075734318acb1339. 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/US2BR9701416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118bb47efaf93cdd78a0601ec3c0c90f8b468f67dd363f38d3b74d2354f00242. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US2BR9701476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fba4777482499d1bef1bc6b5209281b8fd89c689bf1af7e3be422664dce63. 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/US2BR9701478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24082ab0da81d95805025083a6ab79925a8136b4a2fea3cb279bcc03bcf2373. 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/US2BR9701479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc7132d97c98c48c0fdcb1582c53a0c7a9acc906ddfaa3c147736ada6b028af. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US2BR9701480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ce33de21689c5cbb3a5b5b611650c962dff8da175c33f766c6fb662704662e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA561068003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dece71f313e22997cc9e8a02f1282be84e428f385b8799cf81dc65fd1dcaeb5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USA561068004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d16b1f073857e7fa452dd78f8089a1988fb250bc8fb8d92bb2e7d0a10d98af. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USA561068014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118bb47efaf93cdd78a0601ec3c0c90f8b468f67dd363f38d3b74d2354f00242. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US2BR9701476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb984afcc5f020cd4b8ee633edbf8d42aee53e90199991cc6ea82c52697448e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US2BR9705044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ace506ce79c05d40d9d661d19b67189d79e6cd55b3b6faeae3a9a398b1c47e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US2BR9701471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953801096a31fbe04c7492ae3b2728974c49836facea6c0e474c19611b3c7216. 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/US2BR9701473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fba4777482499d1bef1bc6b5209281b8fd89c689bf1af7e3be422664dce63. 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/US2BR9701478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc3514d10104344f86d5715cb77ef74e6fc214c0d724b4bd51fe49a2724065. 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/US2BR9701475.