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 0x7b46a5cd81cf200dc69203af57f67e2687c5983bcc2a792c5dd68edac2822608. 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/b2724729-b19e-4af1-8061-66004b5ed0a1.json and https://artists.proofprofile.net/proofs/artist/b2724729-b19e-4af1-8061-66004b5ed0a1.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 0x662c04c2b8af8a528429ed40ea6452844b5e293adc7390875832cc396bec9256. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM6DC1661294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7f944642c374e7585132bc93aca70b9e5e9be1b4b78272355f05ff25eafff. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QM6DC1661296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be7793fae467f4c283e0ffb35dc108543a4dea45db73a938c602b9c4f3531fb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:55Z), 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/QM6DC1661297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e518956d81d14b2e34a68c48538e079c0e8b8a260f809320a11ee2064a7ba61. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6DC1661298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00faa7655641c78f2ed1fd4d3af3afa74886ce07058056d118f303457db9c39a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6DC1661299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8855247238e6b873fd96af4f9d722fa4891ecd4cf5aa41727503a8f7e5ff038a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:25Z), 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/QM6DC1661300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6535f2b2e5c0f178ea2decadb9cbf34edf86d1b50d317fc03d9dbe7f6ae4bd3. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QM6DC1661301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1940eeca932090c7f97e79a84695cd258d8ba13e832b2cd81be6744220f176. 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/QM6DC1661302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96dd38b8a946a1b1b55eedb02e86bd68090dc70e35d5e2b98a9ce3d103a5545. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6DC1661305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5fdb0022f3b3c061df35ee2a8e700f66594077f15c8c0cddb60fd9cf14b5f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM6DC1661262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8205bc2127aaac08f49f7586234070e26abee5e892705902086c0629fc0000d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:01Z), 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/QM6DC1661266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c284224b46f265ed3b511237828f3b0375dc15a8001d66f20677c49b953194. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6DC1661268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a5a2c651ea39fc50b274ae3aabb3289a6f2548fc95a4dcfb65cbce709e0e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6DC1661270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae986d5c752fe910aa38c74a5756c80e03deb477a549e2bb432dbd35a053a43. 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/QM6DC1661271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e7b246a97285e470db1ec8f7a232d593f014a25475430ef394682a21c38d9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6DC1661278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73fdf005c5eba7839061d53c9a000e96fb99162f0a9394240cda426e81865d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6DC1661280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2fe3b471950ea19b686a69e6ae9c48ee15f309d65761a09ffcf8ca9bf6bae5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6DC1661286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e93df5eb835833ad03d3f5d50c831387ec332b445c7817d50fd056b43e7bb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6DC1661288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021558159a7bdfbbf4f1898223d43ef1ec8189c75be282064337899b96141826. 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/QM6DC1661290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb4caa78415107409b97fd758d2443708a03fed1f8208825debabb8896e5c0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM6DC1661282.
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 0x7cd07f908ede2a7601d47a4bda90a58a8fefb039e14ba3f6b196a3c9b9fe49d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6DC1661284.