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 0x9f2388ae635f11242b1dcb1b8bd4d2a6e5a37e9ee5c025b6e610c1471a764b46. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2354f99-6506-466a-b759-4322a93ff6d3.json and https://artists.proofprofile.net/proofs/artist/f2354f99-6506-466a-b759-4322a93ff6d3.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 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 0xe9ed4b8b9faa115db0343abe80b55597e4889c9453ca9b66bfdf37e8d3ec207d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCADM1843676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a78a3bb980fb03f26a0a497c9714b37e6923a7cca8b2e06765cbfa8befa807. 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/FR9W11918478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c4ba1f1fe03d7f5fee4b53e7f0f8c07bd1be5792224e7d41d56c9b1469fbbb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR9W11929013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a9accbc9240a5c7c5085fd1964a1a943c2a2990cc07cc36240ed3ed6c63e6. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/FRE3G2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a9accbc9240a5c7c5085fd1964a1a943c2a2990cc07cc36240ed3ed6c63e6. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FRE3G2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe30d77bab403351020a3e09176f44b7c07d634f44218f424acef07da9393e2c. 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/FRE3G2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed328183835e736df58b5bcdaced0674ce0b0a2ce3bb44cbdcdb06886cee948. 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/FRE3G2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed328183835e736df58b5bcdaced0674ce0b0a2ce3bb44cbdcdb06886cee948. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRE3G2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137d1b1da11dfc14cf7bcc286e83de27b0ec4037968b64a90c2342329fd6de54. 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/FR8R22300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082c978efa79e2ba3decfd7c34a1308553d0c799cb27b907125b81600602437b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR8R22500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57ad348707ecefb660ea279816c510e352702201280f06404544c1e09bd2c1b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR8R22500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537781c845441776161be8ea25dbea416799f74b551d9721e7f08313801b102. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/FR8R22500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5041ca8fc70b8e025ae3ab7399c7c32a952a4a96b190f70a9492ff8b4ae861c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FR8R22500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf40acb1c88589167f7bc1ccff567f35daad87a4f0c32fab060ba2d2f0555d40. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FR8R22500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60fb936e4783894582b183abef03e9564f4fad7cb415d26ee9450ae555b4887. 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/FR8R22500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57ad348707ecefb660ea279816c510e352702201280f06404544c1e09bd2c1b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR8R22500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cef816e5edbf15ddb67197c00de218d27434f19edf6cd7fb6b4d9c8ca007e1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR8R22500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cfd0291d4fd58c43bb6a6dffca89200c006bd0f4450dec058e609dd789c262. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR8R22500440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34a32c3613079adaa39ca0dc63b946893004cc4b23992d9875d00c64b8c7fb9. 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/CAL642108003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf65ffabe0ca7e6ac7d9f6b8cf7fc72ee4c15b1b98f7455d0e768586a1674b1. 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/CAL642108006.