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 0xed4e1549ac24d0c051b5877cb0fa698e8bd23294a88f877a9860e37723df073b. 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/7f47eb7f-8ddb-44ff-b073-f54e2c93c52c.json and https://artists.proofprofile.net/proofs/artist/7f47eb7f-8ddb-44ff-b073-f54e2c93c52c.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 0xdf1ae07b7fefa5e47afae5c6bfd63eccaca2095ccd2f3cfb9f531fc6de6e2080. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE6XY2379856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebfe1bdf954d6ead9ecc33e39c098a0563cff123a2090b1e1cc5a5d91773263. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SE6XX2346366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35fb39415f810a82f6b61b8a9dd2579a82c3ce3bc22a06359e89d79094cc12c. 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/TCAIH2479349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebb68a8283d9a45ffec8a2639057be9490bfb5fa66cbf37662a8a4f51b996c5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIH2479363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c7ba6c9cedf1e1c36518188e5dce181154a455855991d96054f47badae12f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAIH2479365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b6b49a40025b5618f4a66f333f34bacdeb09f5657f94a2c62446db3908b734. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:25Z), 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/TCAIH2479367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb892cb4bd0b1559126d3e9b6f6af0433895f22463d5ef05cbad99d0881ab4a73. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAII2487156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f74dfd58dad361268b8094555513dfbd78492e9fb32a53db5b21654cfd853b6. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/TCAII2487159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36466789f4cd4ba70531b065b9434f3a4a2314e9dabfc8984b6e6c5de5d66405. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAII2487255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3f1edbd3a262ce4c086d46e9492c9172580eadc3d88e25bffce80bf9d0339. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:35:01Z), 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/TCAIJ2487257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0835cdba9d37c0f2ee06ab1f5202eb38568d6e4b75e071a517b1ce013ea535. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAII2487270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8c4a4f2ed6900d6e729e8da7e23e5c42a8cd552067b0ee593164ad18695a6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAII2487327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f50616dfe6e4831e5bc5aefa01ff3572b5df4990d121e1527083062568b82. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAII2487333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d9cd60c9d7e2c46da1685302e8758724879b59328477499d744005e626abf2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAII2487336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc48f9d544a62a49c7c3def80dae7fc6ae95a805220427343576f3b1ffbfcee3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAII2487337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267adb330a59ac1c0bfadba386f174008b46960e1901fe08b2720e4eb7293507. 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/TCAII2487339.
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