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 0x2bd9687e57f92f173651dad6c5703883952aa67c44a42e0941268ce62e8c7fdd. 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/7283eaca-3b7a-4bc5-b175-e9cf560f758a.json and https://artists.proofprofile.net/proofs/artist/7283eaca-3b7a-4bc5-b175-e9cf560f758a.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 0x67574ed62db7812f98512293ebbc94da81105830598f4415f6914c6b7a53ca65. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM7282446397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8469e857ee3906b847554e2b6c6dfdd266a603b0fce01d30dc1f514911def320. 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/QM7282446400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d7f55f46255ca4cbe9a5e2a2c0057de3f2dff1d6513aee5e25fcbbdec6575a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM7282488371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968b91b9a18118a0a72a2820570717c57c55787c1c32f03a00e1381b8a7a5957. 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/QMBZ92466416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941de77ecf9ec9d14bbf1b97386f7b6c3d76610a03c4ce960160ff0566b13068. 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/QMDA72486013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b16192bd470fb365c02a8be4b59ac372f4b4b5f45b417df89bb302e16e9ed9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMFME2414274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2410c8b67b177a08ddb84665d93cf256a8b8e75bdc7e8d0b830e8d2b08ea3460. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QMFME2475913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd0c519e90b8043f078ecf3be8338106cfd80d0aac7f50a4fda9e169c753d1. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/RUA1D2529689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2a96cb82095602672e35ca9b287ba9f4f9f946a59626c501734f43f3f91243. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GBKQU2507175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe30d5538d5144cb0a657de9cb097529bb57a9bb8492ccb09fad899954272e2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUA1D2539317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c0abd75909bc18dd592d8f0323b98148638f871f5af0aff1c4bc3171665ca. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKQU2514820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9335b7f48610667059bbf89cfd853fa6c267ae5b20bf7a8d4132834cd701711f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBKQU2517415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b46a956cd825d52a4c19bc9331dd19bc15038b9899fea7f1ce3b1041986839. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBKQU2517416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69b76b83fda1db99a12e85b6021f977afeea2171d3653273b3b337888ca6c53. 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/RUAGT2544623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899046884cf4efcf7df51e1be61fe5f484f10716fd7f77c3c281c52ccf740684. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2546792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733206533c6b736ea5f6224a304a2091b52bf3f4cedc99d60c90a95df665ba2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/CA5KR2546793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4a673eea83e259f41d9fd658c8cc2b57d1bec3dd8df021c9ad87d6ddacab65. 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/RUAGT2554133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e9e9ae71e25dd604d56874703eb8b5f8d9dc10529cfb542b8ed4c04815be8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DGA0H2352952.