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 0x28190c8d84542285362d9ff8ded547fd9824c58fcf8528dd15f20650d22d2aba. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b428d55e-443e-4232-afad-d3d6de0f154a.json and https://artists.proofprofile.net/proofs/artist/b428d55e-443e-4232-afad-d3d6de0f154a.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 0x6c01b6ed11962cd2cc56a68379a87a31aef75f20e03788b9b00f2f18b85c753c. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAEE1918886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6bf98cc21933589a540b7b1395153c34c4a3f8e1c2e03540b83cc3ed5f2e82. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:36Z), 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/QM6P42005926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0c574f85b53d7f922977c6e963321be49d926c687bfe2a01eb45b97265157. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6P42017962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0c574f85b53d7f922977c6e963321be49d926c687bfe2a01eb45b97265157. 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/QM6P42017962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc99fdc9aae0d44400d95531028aba9aa665caaf75624c5f4946e4f1443eaee. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM4TW2143928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc99fdc9aae0d44400d95531028aba9aa665caaf75624c5f4946e4f1443eaee. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:48:17Z), 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/QM4TW2143928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3165a1c9536d354bd47ecc285254e53af9c04801d2295f7b36c7926d1b56fb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:45Z), 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/QM4TX2118527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1899244fc72092fe5ec1baed9f7c19416f4a7dd9ee208990064d0e7f0eb98b6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ESA122523514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a90852239b1d35748977ee8ba219bb8a708424a08c40ab8830baace13527991. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ESA122523513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee8570eae351321c107b71c1a644ab0030df7497cd1ec9af9aed6d576a9f85e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ESA122532909.