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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 0x6b07e0876e0e3783c1e82255768efddab3af44cd45a5130d5b6168bebddffc61. 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/3e7290a2-db67-439d-8bfd-b7279927cec3.json and https://artists.proofprofile.net/proofs/artist/3e7290a2-db67-439d-8bfd-b7279927cec3.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 0x43b540f462adf89b75803a09c0453ee6e5b6e3ac392d6911b1be0208b5fee78a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN81908359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0625d9252866eedc7e0bfe786fc4a706c14754945056a2f1205e863e183ebb37. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFZ22124479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb933eafab53f5d0e4230c3928f8b529aa5499562c8ee9e97c5e78ce778ae4a. 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/QZK6Q1959647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0013e513af542334b5352ef4d1243621764ae0c0bf6b80c52436495fbb369c86. 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/QZFYY2025315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df1e9aa8955e77f3c38673769b322f53661ad77f4b628722f9b2831c518adde. 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/QZDA62097292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba1f96e03818144e69311c027b1db54ab46adf0db91986102e7eef45b39911. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZDA62093478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732ec973ed8df7ff5d8250fc77264eaa88f7731cd6fe728f3f8ab5b9487bfec. 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/QZHNC2069565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a63d097e05eafa2d20f68debdee483e49813536b363668a093177e6861e6e0. 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/QZK6H2029149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6c627bea5f3c1d7209ff23ff208c006103c32a1c9b3c3b2789a8a5365da61c. 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/QZFZ22124462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd92b7aa6a04cf67c612eed9064d1c6bfda1547416bec5b8ad585d2c77b91b8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ42162983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af82d779333861c47c8c05e6c1247d0c0853d8e30a35eb8d7929e79721d7db. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZDA72111301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c7d46c5f16b9716fa0be9887bf2e27ec307bdec48429eb87628bf7a7dbf451. 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/QZHN62191535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6b2213971975c8a689f7d49b2c10ccb6fa69727791419226ef540ed83a7ef4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHN72116727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4b73aae4687149bdf3cdd901860e7bfbceef90cb5bef4b11b7daef0250e7d. 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/QZNWQ2101897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3fd9c37740128c625947b48899cabfb5287a47c8126aa034cf59dac19935d6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZPLR2196977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2d914d3e85459a50fba8e7e81167ff0af443cc12d70037e1118be68364be9e. 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/QZFZ62205563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8321668103c89fb3e52ea9faf680022e518e0a872bde41d69ea18e64cd2cf. 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/QZK6Q2238336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d33f45c6f4cad2562b4e35423b71de113667aee4826e79d8424027424ae2c78. 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/QZK6G2311135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a8bd4751d25c5971f730ba7d5848ccee4aa9973712a4231f8d5e555dde27e7. 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/FRIDO2212131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf568bea0b2368727c0a894216311cbc0d0115584fb85fe34599aaf26b91c43. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZWFM2390089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac56e300c197f6ad99bf1c2d6dc9c90f7b97eb08738853057f961a2f13d17a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAZ2458574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb214bdc5ac0b6775f6cbb6d5b6ea2f570f444d18d3b9ee188c2cdd479b00a45. 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/FRIDO2414276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b9b52e9f262a121a69b51c5516320403080606b3703d7ddffa7616477fa1af. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTAZ2460093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06c9b2dbdf39414603342cf354003e534763a65af5c24d39cbbb02aa546adaf. 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/QZWFK2493977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb50ae335e80b3ed3a35a4f4fc8d7d9207cd86773648fe1eb88a42119b3797e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7N2453331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73674e21937bef228adf1f99d963ba5c865037d9bfce7e8ab993f7fc7ef69502. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USUYG1765680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4146e0cdd5d9d23dd20dabad39e11f42a12531f3fc9a12090b3b8c7b7aefdcc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USUYG1768466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f55eb59b6c86d49a6e246996faca038eb34925938c6a167969a3222891f4a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1447798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b81c6a456ce8a9e7750048b663c12048f008401915bd22d19f75ff6ad2ebf4b. 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/QM6P42356022.