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 0x64ed8918f77a97a0ddb9882029a39ab69ce2fe0ff27f2cac13e1c62092c392b4. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59cac6f3-4185-4005-8d6f-43a2cc7ee99d.json and https://artists.proofprofile.net/proofs/artist/59cac6f3-4185-4005-8d6f-43a2cc7ee99d.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 0x6f6c42ae9986a66eab1e5f5407778599fd6d59994a8b6dea196e2cdddd4130e1. 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/CAM460402102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfafcf8afeef23fdfca94dfbef72239e2692ec5f16ec6b18307599d14de477. 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/CAM460602933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a20d414a8bd6eb02f7226c4b2799c0f40f6e6a7dc2bd7051e69e362b330334. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:17Z), 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/CAM460434424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb5b0b92ce4bbba71bd85a9d4152f8f50107810462db2e8d82dc937900657d. 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/CAM460401979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd592c449839e141f926982b56ccec10c3eb1cd010cb681b120ecd5e9765853. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:58Z), 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/CAM460402429.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfafcf8afeef23fdfca94dfbef72239e2692ec5f16ec6b18307599d14de477. 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/CAM460602933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd592c449839e141f926982b56ccec10c3eb1cd010cb681b120ecd5e9765853. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CAM460402429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66849678921e044708b3a01bf7cc09af1210748af8eb454810bc1cdea6871636. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:30Z), 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/CAM460400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c121a6e56c9028a7e210ba0dd6ce559c18e1bc64073ef447116fdc39f4ba22. 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/CAM460436022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4ba9950fe80f31dbbd417575d44c8514cbe2148bdfce8f3ba4260cdf734ea5. 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/CAM460406520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926d9776a1fe0e9ef69ef2e40ad4dde8c2431af2919cad8ae1768202a1c2cd62. 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/CAM460422779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455b69da2cb2f6747372b9831329d2991e65a5caec8074198f74e208ccd9b2bb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CAM460401104.
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 0x14287d379d96dc9a7046173bc96dd60c7f7beb6f30a592629ae1568da5c95deb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAM460402920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d56c041fbe02eb30ae306d2be80cfc6b394951cad14cf600d4c653b2705392. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAM460403602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79631bfe046ef6fa1e7398ce9918a8b4bddadf1bde900703a5cb4603416b823. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAM460414019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629b94ce1d2b57eacf9901d7aa770ac09b1893487aad5815222a1dc932c8cfe4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAM460402343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcebe5818fffba4ce7e26c8a381d68981e05631790841281491dfbfa9715b54. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CAM460410229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2110a236fd2895e257743310b8fe6bcc67aac04dbc2900e616b5a5c79d752044. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CAM460402331.