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 0x105118393dd23f865941f7e2e4e461f9c2ae53114ca4b8d90146403cae18a7a6. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f09ff790-7952-4f7a-82f5-d949cb5dc184.json and https://artists.proofprofile.net/proofs/artist/f09ff790-7952-4f7a-82f5-d949cb5dc184.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 0x72f2db86055e6a79c3fdff4d42a7d03915f4603984b874f15b6a0ba7a45b4fbe. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCADU1813958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c7502272fcd45ae57c6f7ebde8e6d3e30cd616313957f5ad7852792f3fe676. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADU1813960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4165e21ebadefa517fd25c776291f3a4056eaf0d82a3e516214bc08a37759. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:12:30Z), 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/TCADU1813962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1896b6b86b2179561e9f019815ed7674d4c77abe56a999d5a90cc07d5885b303. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCADU1813965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8055ab708243e72295c18e4c71d4cad91a4a4e68a0bb3da4d36da4aacd248a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADU1813968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c745910be25511e476bce77089b1af3cea395e7728c5235dd348e00f2fed8a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:26Z), 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/TCADU1813969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb779780591d43e60868886767c9336a1263292953f232010103e1c9d12ce0164. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADU1813971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41fb5a27776b29906d73f2d70d97d3f43c1494deec9977e79f671c3506c1dc1. 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/TCADU1813980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a7eea3fd77dfb403722ff88e0352c32b6a7446b06a7d2d6512bfd0fba492dd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADU1813981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb8c49ac4dce39cc6b42e18a4821ecc3d5d5c09400dce2fb0ac6d0a42b61b0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCADU1813982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa205a26819ff44b36f8989b809feb5903493fa1125b8e70a35680d813f54f4. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCADU1813985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d535061e8dd94aa45513244787268553c368ccdcb267fbc607faf1bd988f9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADU1813986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5cd1bfc0d2ea88a6602bc5af7773eae3b7c1a76a378c35ca83e636c81876a9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCADU1813987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf26cbaf4a9a06956e6168329dcddaee29627d60dfd48536e75df5e7dd0e889. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCADU1813988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738cec7bd5295f0c2f4689cb027a458499d99a3b84dcaf7eabf228ffee928ad2. 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/TCADU1813989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c1da0470f696e1ca09dd4024e65dca7e2993085559e7b3510fa9aaf0705a1. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAGR2258692.