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 0xaf31d5eaa49b23f920d05493db8803a74e2c2a4d377cd8796903875fcd410149. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac360e12-9f78-451a-9c8b-f7769a259514.json and https://artists.proofprofile.net/proofs/artist/ac360e12-9f78-451a-9c8b-f7769a259514.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 0xbc8228803a6195f8b5db9e90283a74d20f1252be47c1923979801657e99dac6e. 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/CAGOO1955750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f87502447ed011aab4f85b03799cc33d8baf24688211b6be3149bcff6d8cbe. 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/USA2B2201171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6827ef4337c3b37ec242fc54c1be18127d76ad8b93a18c43e0524a5bac748545. 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/USA2B2201172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbecc9bdfb1f4613d5e179d1a50c6e057a4acd526fc71612b8fde7f2acb7a742. 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/USA2B2201173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205c0c6bca0705d3aa7e959fbbffc3e4e2e182a9e28a7e185861e91e6c55999. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2B2201174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54933f5bcc7f445eadeffe45083ed6a3e19118a40d72b046d25aaf2fb8c93bd6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2B2401349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf271faee09c7a364664ca1dc86e3360abd1874d85cef21f5533d94471134e. 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/JPJ902205470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb941bba7d9d58bce327ba3860cf5a75e2af70b6ccb7db5e8c47e29527affb3f3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPJ902205530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d04c76f5408e568bf571c46d496f31f58ae8b4a181f123f86924dc1f1b83a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPW2330298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d01ffdcabf45e970edcebedac24bce393e010c5a6cc2c18739f2e5bf3b079b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCJPP2103930.
On Divination in Sleep - Giant Claw Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab799bb42fa281121b96e4d496665847a78fb79a90ec1d2101fdeec39790ee0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCJPP2123615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d13365b53b46a098205d681fbbabf9b68560c59c7ebbd4f20f71a3a83df630. 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/TCJPP2123617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efc7dceeebbc7af213ddc898b7d372afc2e120b8f81f73b15fb083daa11fb94. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPJ902401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8aafd6a7fab6f3f4c5bbfb47e852191530ac44d7db15dea72fb3af88085a47. 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/JPWP02000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba1c7c224e27b21362c0b42322393f69cde55705b8ae119e9e7cb48fda6e66a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMBZ92480037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736c2162869b6ae016209e78b5494fbab67f56b9e1d2313d6aa8f5756ca01a96. 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/QMFMG2365426.