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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 0xbc22d6f93a17c69d12ab65b29cc6faf7262effd9e641b5444491c0189df92e8e. 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/3e120703-683e-4a75-9366-27aaf8df4747.json and https://artists.proofprofile.net/proofs/artist/3e120703-683e-4a75-9366-27aaf8df4747.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 0xd47f8d96b439a0584024c425b6712eff9df2a05e07f17df0b66b0a3d11785acc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEWO71700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f3d25c96f076c5a5725b33dd759fe5ba714cab89849aca2e52c3db95362f29. 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/DEWO71700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc964ab468866fc93d119c8ede52b901c4797d1962df596a14f6674115f809230. 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/QZKDK2149987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f839b98e5ae67cdc0f09d5ba3ee32e8bccb0a6babca4f826a91af4cd9b18e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZKDK2149314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374faf4796e8f122b60d8e234354175709b860fe650d96c87621df514251570f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZKDK2159887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edcb62b3d6b22f1a00f9e5ddec857c6d0973c161e8989ebc072e33ee1b5292b. 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/QM42K2155719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf02b1a377ca994a2839f014b004b917a1c99be28aa21662e43f3237efd74f01. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEWO71700242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93884c31baff6b6fcc536cd13c7e05f4af563dff1eea36a8b84fb023ace3c878. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEWO71700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce827b4c281e14e7666d3dcbc6d03f2f6a4a903fb181c419f09a6cd9fd3f12b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEWO71700351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d5fd7c44552316e676ce9126a7b24cda20c04c3f3ee3f747f499b633e20df. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEWO71700326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e90ac671fd7b93efec98ff12fd456e76c7a39c082d95927ae7e1ec007135f4. 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/QZNWX2255717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf44099d417f430b09b3168e3579a7c053fe0109d824a90b8f36e49d223a086. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE62M2259136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82612e67b822e0246ebb4e6887082b126ceff3bdb7292f2ade5fccc5d0d1ad9e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SE62M2340703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e8910ddd82c2b103960169ebe04163c3fef7d249e7c3f1d78c5a49f92559f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2492600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca8195128c464ec9e31e5f4ccce7d8a4a694050ed48c75ab1775770de192a1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/SE5752440427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7515289a782490b51dbc964a09198ebbb819ecd988f84f18a751309f4b0cbac3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/SE5752440428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccf1bac6c8a8ca2e6bb00806bfb9faf7c7760050b3f08f4b5889861c42d89e1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/SE6HN2448019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f0a1fe4301dedaf8428aa99087fd2ed7e702ac4e3902bd22c64822ce6990f3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE5BU2513062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f0a1fe4301dedaf8428aa99087fd2ed7e702ac4e3902bd22c64822ce6990f3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE5BU2513062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6777d9a1de42b05fde0df73ca5d4d440f7bca0c083128997287982700af1b58. 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/SE6XW2549260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb955c7eee9e77adba7da4fecc105bd7dc8df148391f1ed88265830a1cb4d2908. 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/QT66K2507754.