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 0xf2d4c3e768c8969db715791143fabaf7da67e609ec69545c28e804415d8cc5c5. 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/93350258-9601-47c8-b2a6-fa5a5fd80d1a.json and https://artists.proofprofile.net/proofs/artist/93350258-9601-47c8-b2a6-fa5a5fd80d1a.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 0x1e4093f427643a886998d4763b2041009ad9bb6e464b01c8655161e8cd293efa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:33Z), 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/QZFZ42027622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccffe5c11f9894b45105eac033c471bbabfc475887ce4f2eb713410ba51990d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFZ32152801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314d9022935201c705b959e3b0f80240d7991e3fdebe0291d233ba2ac7d34630. 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/SE6TI2346520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ba02fef13e3f82391daf3f7656f6b2819bdaa16074faa30737859d8f16fee5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:56:59Z), 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/SE6XY2393625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f81b0a4424c3070405f124fbae69f6789f9f4e1c7c9d48f3bb05fe1523d4de. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWT2568225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379ef20e5dfb01c0f02eb7888a4f6ef17118fb75bb741cdd531f8dc48bbb7ee. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWW2525824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf20ff1a51bd26d44d3050b40770223365a7d40ce1e30c4b2322a245e9d99011. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB62555446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51edec55cb24aaf5db7074b9eeeeea238f1f07f5605bd4c12790703177515315. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBC2585640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb093a74d602976283efd93190fe3477a28523afa639b9bcd1598d38b070ab0. 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/QZWFM2517414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9313705f770b3b8ab3033da07ad73f487911c1e1e3b0a8f44d6a87a1ad68b9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7T2589723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d7279d4404dc4512ac50154af4fd1fa764fae6d3089b2faf14d5423ce257cc. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QT3F52569796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6314ed28eb303ea36dcd2af1f413b74edc7247c022d095f15460868621704502. 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/SE6XY2274310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258556d5d1c433939d7039bd8861f4cf942217652d17fa7b4459634212ce6f3d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIO2459146.