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 0x6204a3e86b76f42efaea30f322dcf760c8d3075ae218136dc69810cd29f95384. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03a3cc1e-9be6-4b62-a14c-4a6581d325c1.json and https://artists.proofprofile.net/proofs/artist/03a3cc1e-9be6-4b62-a14c-4a6581d325c1.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 0x485a9cebdf6edfca826f7f70b1b7e754b2ca0cfde20decc61c022c44adf8f8ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4Q2365546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6402b89c1e0b82dd4d9c2892a2c79486e55ef997a49e9e2be8387b3c3028f8. 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/USL4Q2365544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7281fda31b75d471c7b2205bd7a516b63f8e855e653c9c5767fb95ed63160d29. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USL4Q2365547.
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 0x7962fe34e8c8759de8e2a3e9b75cca6697ea6c2241fe7e3d2a9021243e9909cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22280062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d9c03a3636324d34c8f1bcf8770ae677afb5a72596852dfd179759a33aca4b. 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/USDY42093883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf649e9ef2fb136242b4044866dcf98dc10bdbe4151ed05fb753d827123925235. 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/USL4Q1957105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397b9e95245a737f2cad3ba1cbcb1fb349e25776242abbaeb87e9fcbb758559c. 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/QZ9Y21776430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2934ad5f071e07b56d95041bdd121396d609cfc9bff08dfdd04468f8348338a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ8LD1905449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f82996f6c6d3c025bd835e8200efed7b2564a491723edd01e434dcd433a14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ8LD1905452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0248b7d26e6bcd5771eb49be9c5fb5c00fe0ba6cd4d0661322fa70755ca99ab7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ8LD1905451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fcca1db88c716d0095da423dcbc95a126dcdb88afeaad0d9fa86a5784c6c34. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62312796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1435f90af1b0771fb30221cff4317bf312492f39020069ebcf378c3f1d5dd45b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62312798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94a1c31c5ab4b8126f74d6149ad65e29b5edbc618f2d1f3cdbfcc783890d0b8. 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/QM6N22135346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187293af691c81bb4fd8fa9de480b482c324f0ce2b2c743d39c4e99d3364516f. 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/QMDA62312802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2be4417a96d3f79868d72f81538481e354bd02e52cab7a378ad59ccb493b00. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA62312861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd456d70eac98e824f39442c3e5a40f2b269aafb724c1a93efedc9e538a6bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62318092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f83bb087574933d147e564c4808d4666eef609600efd9ce28ab860ca740c5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62318099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84753b7efb5c87c9077f2855a51fb5d347c8a32e74c0bb35a04105252fd9298b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA62318125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6534024388f02bfca8b6c0a91b84214875d84614c3333db6e483e3c5b5535cc3. 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/QM4TW2232239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15334c52e64825b9d3ac79395c218d305e2383ef8b6afa58698d18f772cf2a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2160743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c31ce69458fe41cf8b7296dbc68553dd95ee95f3042f1ca6e5ce18edce01ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA62318060.