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 0x02e9dd862def423bf1ad399b88fc3d2d662512d0efefb168ad8f0389bd2d3599. 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/9dc9dbcc-eab9-4480-94a0-8d1af3bafe42.json and https://artists.proofprofile.net/proofs/artist/9dc9dbcc-eab9-4480-94a0-8d1af3bafe42.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 0x11bf471490d5c008bee6b79d22799cc6522f60dc44c7527f95c5d1911aa5836f. 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/FR6V80813731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf491623b987ea589a8fbc4889d1dcfd0575a4a933148fc54c57490f70a73695e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR6V80813732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb43695d1d89e57e6f3274a8616e9d157d0398595570e3c8061c8dfedd1060c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/FR6V80813733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee04b9d429c78115b23b69282db1f9e3e13af2142ac625057ef6d1b662cbd5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR6V80813734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fb06c4ca9dfcff65c503edd5fe24fa7abc2332559c11abf162806ea51302d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR6V80813735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518dc912594f631493253ce11d9e69f4e2f6ed22a0c1f4485b5e6d3b965d9e09. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FR6V80813736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46d73cf47743ede487a69740ad7e58d9471b892c386e60fa5ad5e92706ce48. 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/FR6V80813737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8124b998c1376b669607da62c9e4f6e3aac1ea860b6a6b9cb7c1285250a6f6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FR6V80813740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706bd6afac328cbbda7fe2cc2befcecf0c8e0ef082fc5d0375485eb49db5453. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR6V80813741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8885b38f93b5d4bf79842e995ab83fc4617f2f2a9cd642af0e3ec3dc0f8796. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR6V80813742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9d9a27859db698f926e2238849a235fe2eb3bd09355ef37f97092f1fcf0c08. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FR6V80813744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e5a84771923e9371784f423cccc8859d7d40a0e3a083e3e9762f824d424d9. 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/FR6V80813746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b263852854708e962330392244ae2b931f3909c115c28c838486ae2612575fa. 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/FR6V80813755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c59c3ad49e201a863e23c8c984b28908990da23a434d85bb7f3e446238837c. 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/FR6V80813758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe0f78206d0e533ec8abc6f4dc75e7860c2a982b238112c5163be988f02cb33. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR6V80813760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4a53c3f7ca5f4056c070b9e80124653e4acb72eb077863ee8641a19215b20a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V80813767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a166106d221fec959e31be89cb62aff4c06dd885d65e89e18b9e215a287f3a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR6V80813769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345858e5f8f4c93f9c28cf16bdc090c0b311a329d82ccf7fbe098499eea1767c. 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/FR6V80813770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba61a44100e9f63c1d37e33f9064007c8d74d8b53bcdd30170cdfed02cf7ba. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR6V80813784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ea26bcb67746a264f6e0f03e1c641e76ae2377c847611201ffff652dc5f756. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR6V80813790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61766dae281723fd9141a09697c3d6d247887e7ff38051cfe5446929d36a85cb. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FR6V80813791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952c083b6ed30955732f1fec78f91921b6ac8f6c18073b2be468157cb66b916. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR6V80813798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff3574f117c6f10a9dbb1e7b80b6a4fda500b8510fa79406ecbb0cdf71cf471. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FR6V80813799.