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 0x3c1020487f0d207d6d19b50d1f64400e3c63b04502399b46ac48fd3500493cdc. 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/75d138c2-fff4-4ee7-bd41-dc8646d40469.json and https://artists.proofprofile.net/proofs/artist/75d138c2-fff4-4ee7-bd41-dc8646d40469.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 0xbebfce334fe4425159e5ad5cc9283b6a0736d7583e27e4c32fff99ea86a3163b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZDA72201097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbaa7ed84286016d69ce44d064e42cd46b652b330958bbce14da7c981143442. 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/QZES62261805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6564711c9fa68df9c0a7c453dd23238cfd41e78440bbf248c513fb9561a9052a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82262980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b690c36514ac8b4e23e1b5d9a3b48ba68c7f53a2476b8b0260c2c1a6fdb1019. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHN82268964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff0a5bf25e10068294ef4668c048f1fefe0fa6cd12c8e7968d9d62bd362051d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZPLS2245709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f565aee72e315a81b93272ec1d61cda501f160c745a0b431a5e3b33d5fcbfe0. 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/QZTB52392982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983704ae0eb3078a5007904ef398b461ac24778d4a231e4471854db6c54a13bb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFN2353175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996c1dd137965ceea2b3bb977fe163e9f03b82b30caefa99e1b94af0bc6250ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFN2353176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9550a9a1f2a40e4a25b80da9d7b714a8f219167808739a406515b98a7ce85b00. 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/QZWFN2375304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de2f72797d4b2e419aa9731a994bb0894e9f0b7bbe7788df1d9b6aca45b2557. 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/USDA12419282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de2f72797d4b2e419aa9731a994bb0894e9f0b7bbe7788df1d9b6aca45b2557. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USDA12419282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944f00e4d185fa3b17eaca73ed0bab24944d76789b42d172ba0d5dca29930cae. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USDA12419279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82c54bebaa983c2edcb42a7e0a2e74f736fee716413580c59e73ce262e9e1da. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USDA12419280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4d21842356b1c455f5f5edd6cfc6d99580a56bcd0f99092147d7a05d97009. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USDA12419281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724beef9d490cc2ee51bb81cdf8b4d0c47ba321acd7471188d473f4b1d8625b. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZNMV2495906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8222ceeb6aae4cbb44370c952a35cff2ab6d884dca7d0052d176e8811c21db82. 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/QZNMV2495907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c200bd2bed0faeb6b057211e99fcd6bb773a54a576ad306bf97c03b97ff5e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNMW2439661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee9b1721a91fc43480a778f2428b5c00bc57925617d8893412217aed93baf8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA62594085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ecea59b68e62f67d45b14b65a9b27e1f68f687f307232ea81b6a1c138b3b6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZDA62594086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e115caa80cace08357e893ce050a29851281bde32023b46de678469cf0cdbd4. 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/QZNWZ2118952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a614b9b02ab234ddbef645b78f9ff77492f62958c538541dfdcfb0b6a1ab1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZMEN2263243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0132ff8434bbf5d991958cd77c62df475be182a19de085c95ff839236141e607. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6F2291175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0726327e4251f8267e9b26daae36b50dd60af3bc0169d06c8af61b396a7188. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6F2291176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0423b3550c8b0dfd8197cac6be1206264bca1cb0847b5fa19dc413631ce8b5c0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZK6F2291177.