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 0x729b9caf96a4adece3af65d38111d88558e7402e304fa1d2d91add2b0f1070da. 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/d9ce3544-8165-4f43-b736-f9dc4192a685.json and https://artists.proofprofile.net/proofs/artist/d9ce3544-8165-4f43-b736-f9dc4192a685.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 0xabc721c951a5fca4f2a9ad0458f7f3130d9c3dcf19a9ea68a68b2650c60bd7cd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBKQU1295798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce7d201d09487fcc3b58d43a22d166f1548205cc820807a1f45258bd98f4440. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USLZJ1502119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998438430f3f7746a0881077fe87d910b1866a6a38867c24a3ff68d2a7c647c5. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USQY51571125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73fed539b745e960e3f7cd2101e523328b469598b36f1807f80779f9c7c5331. 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/QM4DW1540920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d80e3c99d8f201fd95a7f595f994195c3be7a4280c07ebf14f15d573c013663. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM24S1703008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d155157e8ce8de44dd5b549ebb1e7967d1e2cad75303acce297e8a6e4d4068. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLZ541800464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638da4859376f0e74f564ec5789a299196d94bd3c1cf66a262391b63f3305f48. 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/GBUM91800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071c707a4eb405bc43ae5fa90e73034be5c8e7d9fc20c8d83789c1a2f28e460d. 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/CA5KR1844968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240c4e153cabb7afe4ffcb518e4a0d5ba6ad5c08a00217e8f164eeed57a4292. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CA5KR1931561.
Millionaire (feat. Nelly) - JayKode Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3877555f631f6b9fade02aa8286811c5613c6d39e9de621c4792b3368e6c9fe. 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/USAT21602181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3877555f631f6b9fade02aa8286811c5613c6d39e9de621c4792b3368e6c9fe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USAT21602181.
Titan (feat. Nolan Van Lith) - JayKode Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9d3efd12fcccf2e8f2a05522d3596ba9b46864745d43b019b5dbcefbed34a. 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/USDM31800308.
Gangsta Walk (feat. Nate Dogg) - JayKode Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103c8de52df76116d148de224339709e356b87333da72652673e065aeff2c2c. 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/USUS11600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0bfa871e97b67a6cf13fb91387ae0de682ea648617ed436e6e0ce7b5db7798. 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/CA6D21900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00643bb54a503a6f18aca98e0944454f2f8301e23a386ca52ede671737680b60. 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/GB7YL1883001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0bfa871e97b67a6cf13fb91387ae0de682ea648617ed436e6e0ce7b5db7798. 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/CA6D21900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d73bf9c20431ae20ba2eb7d11d4bda1ed9b59e6ab91f4580416ab22b1e4aa. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR6P11700210.