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 0xc3d1291d1884067b932d3a6c785d2b237dfc1281220a42bdb52ea1c1bd383849. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fea5d1e-c56a-40c2-ae9e-5b0fff698fd5.json and https://artists.proofprofile.net/proofs/artist/3fea5d1e-c56a-40c2-ae9e-5b0fff698fd5.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 0x6b5dc9fdf60a5db7646e16cfe636414b2f32f3ce2c5ecd7c1d44e45b79905f5f. 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/ESAAI0187958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec804d3c9ccc6d20b14eafb3e5496e7003a025787ed2dd37645da494afe9d572. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/ES31E2302110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41a463a37a931ddf82b5752404b9ef5a390aaa16d60e561e23b6d69b462a1fb. 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/ES31E2302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e4574ab9b3d3dbcac6ff54bd5e25295c82f2ce964fe921b968eed6283620a9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES8240923602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9a5f54e102230d18a32d969d46ec2248c8b8c1078dbf4589e08d13575f0a2a. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/ES8240923605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc520f13f99ff4cad0ad953fe722ce74c67e6339a5f4ad6a7e0885b3c93df0b9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:21Z), 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/ES8240923610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc358264107bcc9b22c631c0f13e6500a40e6d8747130bd58728f4319a1b53b84. 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/ES8241626001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611556b4030006106a471549dd364a17394c7e5c9d879eaf4385648bdff5a885. 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/ES8241923904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10db6512663924d5aa4ff975a8dd95301f9e737a15db62962c3d3c9c4fbb344. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES8241923906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fac825e7f65b470340783d39fa3e8da8586be7ced884fc4f2317dce35b3862. 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/ES8241923908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce74864625cf96e801c1b707870c7811e6996e61a699c20cd6bd76c4d91c18ef. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES31E2404847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d3db331582fbf81b10812c48394bdbda6bee9894e35fde95169beb6038e152. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES31E2412607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568125aa9d6d9403aa1997b231a734b5ec05297c0bd39bcfb1e355d92d203a0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:44Z), 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/ES31E2412608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36999e7d49623d2c0a03b31d3265104aa0b054c3a1d898fc63c7f1de9097e2c7. 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/ES31E2407349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6b60125cb04945fc46455c31282be3cedcd61ce351d2a5239116dde0e695c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA561010937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f54a704ef6400183ca63493f0f39f7c06e1364eb71b05d03401c515e386495. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5301867348.