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 0x5da45e6c9c566299d578c3b1ad2297e5198065fa6e7a3bb08054fa7be7dcfff0. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39a1a53d-5911-4a2b-b0fe-7f8809211667.json and https://artists.proofprofile.net/proofs/artist/39a1a53d-5911-4a2b-b0fe-7f8809211667.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 0xc01d27648704614138e563f8fc32ca0ef2c673f88bed9ba4a171809f9210b317. 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/USHM82401316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5ad35e58ed6771e7b6ea1801548d4771b93cf646fe58bece1e5390689967f4. 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/USHM82401317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e5f707b7f2d4e89a80451931a709c2b44e6302838b219a21e3b31014eca21c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM82401318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d2608c722498b566f2101eb137d0ebede38a10964dd751901a225fbe4b86e. 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/USHM82401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5e0f0de7790f698e6d3ebad99ad476d453686050e8c458388c09984378d928. 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/USHM82401320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e280ef10f359fef3b8498a3b7fc3f6a69baf592d4ea97acc8f91f5d707677. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM82401321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67dae3f9607738b6c2440b9116f6130be8eb37e2a164978b121252593cc9984. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM82401322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9e640c2bd513294d2ce954c1640437404b404ff1c756508a20672c17f44acc. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USHM82401324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea667ed9b335a87b38154fc1b4239cc97226f93cf23d34c864d9f81faf6803fa. 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/USHM82401325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80cbbd5e92b96e6a3399e17321c80090b42ef258407a9ba41535b4829db0cbc. 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/USHM82401326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59d5a626e75bd9c3ef074f95117658e92f16c77235859d5f59392ef9298dc0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USHM82401327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d610dda19b915252697ee61744ae9c0f0a224b16416bdf662a1d0b769b4fb23. 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/USHM22412520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5428f10d229e59038b74680071f1d694279bba90cb08a930461d476fbac70dc9. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/USHM22412521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de52ec3ec332871189f04f0db0086e1f711d876ee6ffba76976fd703af21bb. 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/USHM22412522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85deac374d400cf3e1644f67b4984624764e8f9cc7da5f801f64d775abec9f2b. 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/USHM22412523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2686ec2a8d590162a3c8e49aa35c6998432e3a0496542924b583f549698343db. 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/USHM22412524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d846961470175885454fc6d90826c7502f1c6269e3cbb92f961cb0411650823. 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/USHM22412525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bae40abfc3eb83b6e7b4c0048bbf3273abf93d6729159f9529aff2ae02a81c3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM22412526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3fbd89b53b747f267ce22084156da2e2bbcb7180a70a9cc64900717a88cc5a. 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/USHM22412527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a607fd691ae0b529b002e47c25605c5b35391bfbd7e3b1a0310a2d90d69f8. 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/USHM22412528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a724bc4f3d19e3204461bbd0fee728434e0f6db2c6a648720f24d7d27ff07cb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USHM22412529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe053b55dfd0b2fefdd6bc98a05609a72a1f05b150dbed6dc25de2fda155302. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM22412530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e84558b5bea7a425c574846eadca612b9e2203f2ac93e72d3d826c6a206b7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM22412531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe70142d4b9caeb6a0d472f32da8ade0b42f526afcf574ae42e46b8c98f89bc6. 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/USDY42415106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86965757c1fdb8a9baa4c651e9af277a2dd73588ca1f22dd225007311a2ad60. 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/USDY42415107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a228abfe5ff2e9c86a7636236c813211b2d65c385df3807e339280aa52a225. 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/USDY42415108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c89d77be5b121e8394fa2c0c1cc9399229c79a0b368fed888318d471d2515d2. 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/USDY42415109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad1ebd49ad04c94a12235759f3379938efedd47e2258dfa401c1e1075ca2f1c. 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/USDY42415110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2546f12316040f2372285a3b05c5b21d2a234562af9d4064cd3a5d909d84a8e. 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/USDY42415111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aae78a6cb54b79079bdb4a37f1cd25b8cdfaf65877f3221b838b6faf64ece5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USDY42415112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32827a2bac3f13aa9431b4f1bf7cf32b4cf49b161a40fa3b4dd8b2c4114c760d. 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/USDY42415113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b9f584de98b293af6df3745dd5bf7129e41fff4e9df0a0d1c0a3faee9f8175. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDY42415114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce70b9d04cb435c2a7bd366bbcea6a94a5f21ec43c2d14471c144807aec85c8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USDY42415115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353a1a47b2101c9ba9ad721127a113b6c1ed7ad321d06c91209307f63ebd8ef. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USDY42415116.