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 0x2ee4acb53d3a7d696215d66a6d152739caae6e08b5d0885f043ee82f4c895f86. 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/af018ef1-2208-416f-a20b-116276406c28.json and https://artists.proofprofile.net/proofs/artist/af018ef1-2208-416f-a20b-116276406c28.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 0x2f19a2f4febc6fcd93aaedaf9c33f79822837ba31047f4f9eb5946d9c45f26f5. 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/DECM10803201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d139c7c4a09edff3a57491475b8cc3ce0deb45e3400f12b59b2ba0da657f2. 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/DECM10803202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec9a4c9412c7c4fda85bb8bdb0331fb28860bdb62c3d87bf4504e3a4c8ac517. 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/DECM10803203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9131df9cbf9dff1322905702e007f4b4bd6e37e809eaa2f77a615821e77e253f. 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/DECM10803204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032637c3a2dc3d497ba84c13cdbcd96566747329a10edf9003704f50235fcbfb. 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/DECM10803205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467bfc6644c5f647e976531f4503bf39481f370a41c9df4ef2609c1b7882f21. 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/DECM10803206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aed7571dce4bfa8d73602f4200dabbab9b5aab9ea3583e1c13ace6efd5fe3b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DECM10803207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc88b2b45bd0fb4f4fbd5c27e059c4554d6dcc04685ec3f97a5707d03467a8b. 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/DECM10803208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59491586201260cee49ffcd8ad99b028011ccb0a41b28f0adbf3026f48f210. 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/DECM10803209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe97353353f31d00ae555ff8cb612f59fe536a6bbf797dd7c9649f3624e828. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DECM10803210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd66c45f68dd607f2d6a74a00d839b1cc37eae577f0a9ee4be04a357d57038. 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/DECM10803211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa299113e795e526716af7b41589dcc185c0fc6ecdf4c507e2072c02d3ff39f54. 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/DECM10803212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe675188ead30679ee44287f07103370e2d103a2acecf8c49bdfce04636aef7df. 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/DECM10803213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301e44357b124e41b6349e315517118aeb1ad85269dc7035adeaf2c6f2c475a5. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DECM10803214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea5d4fce900bc231883e7dd9871210949f64f172d2e4331cb6d96f368392e3. 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/DECM10803215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd399b7725a7976d73737c9d92c78424933de91afc96e25467300933e7a288fbe. 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/DECM10803216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ccc681be6e442d459b26f5a8878a38f3fffcca27af5eeae68aec46f7c3b431. 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/DECM10803217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a895073e8440bf019592015823999d696acd704a962d33c166fc1e7040960. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DECM10909504.