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 0xdf8463de4a14cdfe7388162ed867a9e1accf7aaf22fbf1f992a469f44f279559. 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/549245a1-90ce-4125-86d7-d1f726c10aa0.json and https://artists.proofprofile.net/proofs/artist/549245a1-90ce-4125-86d7-d1f726c10aa0.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 0x28c260a773993592dfdf5717c8682d7bf062271ec665f628b0f2d49d3d6bce05. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:18:44Z), 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/SE6132398927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6945bf038419f494f922739d22aae0ecef93b8eb9cd19ee136edafc48e3bc3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USDY42411051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ee9f7e30f9b73d2fbf895055e6ce25607fd02e5c4020ac78fbd205a52243e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USDY42472645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77311bda83ada84a1afc8140e4aff3298efc24144aa10e08ccb0dedfba958618. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4R2484298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37031ca5d97dace838c41611884a83b6667571f0bf6482b7bac9f3864b78add8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4R2484299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2795e93a1087e6e095bab46187e528871e58a14d1c630e887989e06c7c129988. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2484300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda999e566657086b20288c21579cecb21e49daef308a8ca87506a8ae4e1d19ed. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USL4R2484301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c341f8189629e3a3603467540ab49275dc06dc43777f17367ff02ccef68a85. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:39Z), 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/USL4R2484302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51c0d29c2c9e4e768cae7120d6f88cef1b538f1eb376c22f844a7d078f269b7. 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/USCGJ2580958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6a4944c61c8e813caf1721322ccecf6affd8cda505f5abbf202df1daa4afb4. 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/USCGJ2580959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce66abb49dd84f791821a9241644bef8275b3f2d4f92f1a9cf4050bd0fdb989. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2580961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca43f5e832a701f0b239c6af0abe383480c3d9f891cc006f57cc6160012bdd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ2580962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830321bb1911aee97528bc020bf360753624a2cbf36ce9dee4366785d8f383c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USCGJ2580963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a907c848287749c1e688548d7e6e2a11854eebc80396114a09cda238132254. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:23Z), 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/USCGJ2580965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726b49c0e1639c5ea73c3c5e474c72677076db915ecbec6fcc3094e919b7458f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:14:26Z), 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/USL4R2536415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e956c90fcafa9652f41aa210ba2c862bfb2a85719477d8753e4e440d22a912. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:26:46Z), 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/USL4R2531146.