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 0x108544445c3a776a8060fdb9531cb41328efdd488cbc7b24fd031a320a7f0d8f. 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/25278dce-c955-4b29-b448-64b8cb816a0f.json and https://artists.proofprofile.net/proofs/artist/25278dce-c955-4b29-b448-64b8cb816a0f.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 0x483238019f399c51ea065e3f90b10a786cf31d3dca42ea731bd49cda25331bfd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBSMU9201884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeb29d2c2824ad5cee0e9896f4bf76ec05c3c6da491db743073cbe577e97b4b. 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/GX3HH2277143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9569ac2d0c207e995a0d4cd6e2db3468eb5f68b8abbbbef237ff53ccf22f1e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX3HH2276979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6f5e7e7c8bfff22387a1ef6ba9e2ffb912d14c76500777a3c512ae6d6491a9. 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/GX3HH2255769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a9ae9b55510d8c71210eb31fb732cea7646bcbf38041c745bc286aa8ebc6dc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2056306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f93870f02b19b58e9e06d2a1d4949c3010433d8e1df822a6272667f12976e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE6TI2023477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf356b3ce63c8fb4da128e32547f1a05bace2d58645e716558b2804cf48c5d6a5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE6TI2061821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741fe67ee04b3db1829518c1b2bf494fdf15462449d21989559475116a62b73. 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/SE6SA2038334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73dbcd6ebb5238bc54b0c647da624fe24cb174deacf83febbc05bddbb4b13fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5BU2110715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41990844f8cca343f8da1abe7433b9545ddc18231f09e3c1f1f91e57524c3435. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE6XX2166083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2013c1397cd7ee0c492a82f0cb4b5961f5ecdf9c31932e3292da9e505bc10ca3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:47:08Z), 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/GX89G2234604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47934f82fcd10a3bf53a9d957e09ceeaa23e3a175952b1a44d8c77348132f784. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GX8LD2344909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc544ccebe49499c7c69075f991b945dcddddec7578cbeddd53a840fdda7820. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX8LD2305768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557428ab971142f9a4772da7ad66db21f206a48fc89b4bf2a537b5ce58b49769. 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/GX8LD2323497.