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 0xb0e73caabd45b72d9a60ac90c7f1c4c2dc34235686bc57b2e85c2ef7024cfced. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d3c73ac-530f-40ec-8d70-da988ad7df81.json and https://artists.proofprofile.net/proofs/artist/5d3c73ac-530f-40ec-8d70-da988ad7df81.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 0x4e87df0f83ff3be9dbfaa1a33ab6cd094f39ecd9caecd618505a626cc5e49835. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR59R2425876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b579925b76401ebad8cd485519cb71aa661ddf1b42ab53c0729cfa1d0df5147. 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/FR59R2425877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e622ac5668faaf3f403e57b1dbb5c660800321eb71bf1d41aeb96e549dea4. 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/FR59R2425878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a0c9ad9139ddf962023935ce66f36a218972b32691ae9a3b033fc83248577. 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/FR59R2425879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d1a91948b120e40b8d74975f583ad605e88d0abcc31861c7718793c456bed. 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/FR59R2419695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b87d132ee17e586e90e28d3794d6c8405fc13cd68cd87e1f55ccd1f1009277. 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/FR59R2425880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6393a0689473199dceca49d13b62142f1fc765107381de09e22b4103020df554. 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/FR59R2425881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b005433ede4d077478423db0027fb38c5b691b494a1172622cae266f38afe11. 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/FR59R2425882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cee1bb8d9ebf6fb470f165f31147459fa001a75eaa1bb9d41ec55a5849efaa. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR59R2425883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965649556bdcb571451b068ad1f6204f54f3f08383b8124e15d79da846cc91a0. 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/FR59R2425884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8935076102102f524344434ec6d1f2e6b805afaad1897e16729880f8eb6d14. 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/FR59R2425885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f37dc5ea6fbe0f6688c521cf392aae33edb3149919230c0a4211d7dd4a8327. 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/FR59R2425886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35951bf25c54e88965afee0c4942823c41897ff7e3563f04d3de66c38dbee90. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR59R2425887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11db242f799bf3c598d6bf5056c2e2ed7a5a88dd0eab3789d7acc6964238674. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR59R2425888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b8f6ba0a1e8a22d5b69f6970b723d2397c13f8fbef7e43a7fc3490aeda2f1e. 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/FR59R2419696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e8cbf871fecaf0089ef04c7adb99d09bc0ac50b0161270ec90148c14537013. 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/FR59R2419697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca618a45dcc07e0a42b636d84bb875db0c6a4276d916053dfa85ae477ae60343. 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/FR0U92312340.