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 0x2ccf3117231cbcd5fe578d7cfb36ad2751e2817b6ea3db733cebfb3cb44b0069. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96f5faa2-2023-4092-899d-cb1133d4c9f7.json and https://artists.proofprofile.net/proofs/artist/96f5faa2-2023-4092-899d-cb1133d4c9f7.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 0xdbbd64fb99a3103672cd6f9fbb2a68045b6f38aea1ff51b4c2e2eadd79b2394e. 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/FRX282493228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a18135b7d033ec050210fb741f3e613505c74d57e91d4882cae7033cb51745. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0R2307931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4bc88cd8d88c4f7f52ea56bdf343a09d17cc638b62a28f88ee231998fdabf. 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/DGA0M2377370.
Will You Come With Me And Sit A Little Longer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf69010de02cf0d73a5b38a614516a2859b22a9e7df64392a659815db10fdf1d. 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/FRX282493229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a96de219a634296b22ad0ac69fa550b317ad23a1ad4a26c0e998d81782219e7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR59R2496736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a96de219a634296b22ad0ac69fa550b317ad23a1ad4a26c0e998d81782219e7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2496736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a18135b7d033ec050210fb741f3e613505c74d57e91d4882cae7033cb51745. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0R2307931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4bc88cd8d88c4f7f52ea56bdf343a09d17cc638b62a28f88ee231998fdabf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0M2377370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a18135b7d033ec050210fb741f3e613505c74d57e91d4882cae7033cb51745. 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/DGA0R2307931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4bc88cd8d88c4f7f52ea56bdf343a09d17cc638b62a28f88ee231998fdabf. 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/DGA0M2377370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987173244e6aa4e9be301e8452c5314c898d7eb803d1338126bc0c3381e7c549. 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/QZHN32207650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc15764b12a97e537fca2c232c7c83f0d8d186cda33f8f6faf1980060667868. 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/QZFZ72269357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca72a094bc3c1d1cc9ecd1280f0ee28f2981da88719ed10958b76245050d048. 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/QZDA82296155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d38a30272ac7ca4f729ed81258c92ebf656e6a1acbe05c4fad31db580cb652. 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/QZHN32207651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca72a094bc3c1d1cc9ecd1280f0ee28f2981da88719ed10958b76245050d048. 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/QZDA82296155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc15764b12a97e537fca2c232c7c83f0d8d186cda33f8f6faf1980060667868. 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/QZFZ72269357.