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 0x7438ca597af496deeb5f2ca98acbde4c17070cd3a5ca08fb52902843ab9835d8. 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/ecf17272-6814-454b-b481-1a506b83d6f6.json and https://artists.proofprofile.net/proofs/artist/ecf17272-6814-454b-b481-1a506b83d6f6.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 0x047c2843a6db8c84e7a1b2068c1535496107f869afaf40a9e44d2138ca4ac01b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:54Z), 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/QZNMY2436266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a18fac7063150e289e22ee919db7ccef234e1b39bc9e422ba0ffdcc61b3b0. 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/QZNMY2436267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726f4af1d782ac4eb5cb4abab2246a72e30adb5035f31018f8464ebce3b57dcc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMY2436268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a5ccc4df1407e052ca10e6b224e9de16e29ddc3582e15b16a9310a6eff881. 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/QZNMY2436270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30de4dbc5f564c9e0c4d9584d4d174d213be93f43f084fc7b925f183ab53bcc. 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/QZNMY2436272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b4853df24e1d7a5fbcd5edb3606d4d293ee6bf9d35850859f365f5d2c1ad80. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNMY2436273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79de62f8030344a4ccf5c61a3f06f231a930c5cb42568e4492426a57cd8566a. 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/QZNMY2436276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46b515496cb2193fb035a22aed73d4b98a0c22abe09a6edc54a37c9667034e3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:07Z), 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/QZNMY2436278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c634ef255320031fe0a4e71fdc6c6273a79c528eed34641e5c078bf7c6905af. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMEV2570356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e7c4414f712127eaddc472818d727387883808f9748bfcdb3cc156fa656546. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21905185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac8cfd5448c68a02f161eb46c754f540afcd80806feaa4f66b4b68df6158c63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21810741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6994c9c3dfe2e42c942c0b6ea5beae5aa818a78c6ad29f8be94dbfe85965f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21810745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6888e9a5dc682b4a9f73e1812aaeecd7215e9aa033e42f054efc60da890c920. 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/QZTB52351521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98e8aba7fdf7db4e6b31d4651dc799a10f1b4f7a0785fb6553cc479195cb22a. 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/USAT21905196.