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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 0xabdae1a81a3e7108b4bf468b5e91971a10444d3f607dfb0e5e19e75aff65fe7c. 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/3d1ce48b-ed6f-4b97-be46-4c8cb3f0d71d.json and https://artists.proofprofile.net/proofs/artist/3d1ce48b-ed6f-4b97-be46-4c8cb3f0d71d.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 0x9455866fa4d3a50cfb3a5eb65b9c9a19d60db2c24aa7ceca0dcea2f31ecafbcf. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DED830473801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9873b3e52ad16469c5f1f0987b5527d8a40aec2cb076a75edf5516845e88716. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DED830473802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7672ab794b7913c6f02ddc6a5969ee5714e65627317187efbe7603f35680e. 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/DED830473803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169309e0dc8876c2f600a04b5c60afa101955ad70d5a9afbbadd2ebb353c313a. 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/DED830473805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe87e1a301d957c2c572367fbc17bf04643cd9a912fdeba947158f6415be63d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DED830473807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851283b475f24a4e7d5215ba45c7850c0b05d6e1ea167b5e3697fb9309e98b87. 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/US94P0605801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035788d1beba966c9a57a85ab31354c765245e7d40a08ba271b24d5c08f29cd5. 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/US94P0605802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec469c39bf8cf1aa6fba53da5bbaffbc60975efe48355846c9303228e8398356. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US94P0605803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5736fd948c5ced67ca128da85c463b43c784fb9a956a6b7b55e3dc9fc0656de. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US94P0605805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8f6061db46a3df9ed9de649b05ab9412883d7e7c0fef6d517d803f3dacf47b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/US94P0808301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bdda0750da874c8f1bec5247da39d9c1162f21086506bea43ef4904324b205. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/US94P0808302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f00d3fe88123b0089d5e582daad7e4c702c50e86740ae6d977400486d507f7. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/US94P0808303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa9fcd74fcda9963a4c19eeaa8b9b41fbe3992fa0b27956519d8ef8f165af1c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/US94P0808305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1320bcf350409917413f35c3d4193537363b287d74ec33d0d6a57f3b340efb7a. 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/US94P0808307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98afa43762ada5a2ce5a22c760263128fd0b434e4b98861604aae117e69e3d0. 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/US94P0808310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff800bd68a1b946f5d4f7dc694cff7c5fc92fd382c337f6aea6b6a509c68a1. 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/US94P1010901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27fcfc357bbd472c93cf86bb96f22dace0600da271df3173085001191888d6b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US94P1010902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b4b49ad991e5a9e6325215938ff3f33249714e8a95a576e796385debcb9c39. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US94P1010904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416febb986cf529bc47427a41b7789e4f3423b96d8debe5deebc14f28569496e. 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/DER371487702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b3a94024d4a606796351a5fbfaa7862311ef9badcad908db8bc9440636f55b. 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/DER371487703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19283b82d58a786321b72aca6f51c4adfb886977bab7d541cb1c9ed84065bec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DER371487705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a0b1bee72c9a953e4b1e6820a1955a902d6a3bc90d32b091e4dde697498f9a. 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/DER371487706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b79b9155c03348748af345fb4a297405f039ecc2d2580278eaee5244a4287dd. 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/DER371487707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003c431af5bc7ccfcedf1bcf5fcdaf226e945e785e6b12071cd70438449ef90f. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DER371487711.