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 0x2654600624bbd0661aa3733d1962bbe2141e99e1e185902e631b571138041aa2. 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/95489395-f429-44af-bdc2-c1ab62b24413.json and https://artists.proofprofile.net/proofs/artist/95489395-f429-44af-bdc2-c1ab62b24413.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 0xa826fa55d6ee2dabeb22994ff935d16ceda840e27305f3ee5a1153682203f050. 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/QM8DG2019568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d63f121a8b5e59cfd2591d1ccdd65779c910e57c6c71a8eb0d2629c9c0fed. 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/QM8DG2019565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d98a99e72550b7a1e92c09ca0ab5bca867427f10553678f13ade90ced09215b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:06:53Z), 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/QM8DG2019563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336309fbc052e736112356b1f38a964abcdd11436853361e6e9687a0b88d6137. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/SE6XW2323745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe7d6e6df7a2075841d37da332bf26ffdd83e35b026ea479a09cf3803aa9bbc. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SE6XY2329330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd478c83f918907849b15b72be1a1b745eb8b4e4355790a419406a75250de3bfe. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE6XW2307072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9356a7429c7c27685e01546040b0f9149eaf29dc95d925c171edcc9870b633. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE6XW2381234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcc4821f582f8b5dd39cabee0c8c9b4744d37c3919f3e6e37d7d6b0894ec4b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:55Z), 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/SE6XW2320052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be0ef9c7b9a10802ea0acc7550b2e4ece8b3a4275fa0f0d5dd4974758e4b01d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:59Z), 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/SE6SA2353024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532373d700cf6fd0c46ff10121ffabadfb2bc7a224442207bf27d8d43e34ced5. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/SE6SA2347842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6028264c3796e6fe36b6e33ca2346d14a64d4fbeba5a2086779b5dc8c8fdcf48. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:41Z), 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/SE6XW2365761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f0665ea560c0c302b5ffbf568068a36647040cbd7156ba1013f5933d1081aa. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6SA2399697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba529f77b0e4b85970ddefa31145d08401456bf2302f472ba40ee3249613f53. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/DKK1C2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9799db955df024e7ffc5b38d6c9040c9584b2b5eb3786c33b39d61b589f4b9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DKK1C2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f037541f79e504c566488369dc06dc405a508ffa955b4874dd0d004e48663c2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/DKK1C2400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f23cc906e6287ab5a2cf52c6de33df7857649d551cd81df08d21bd17a848011. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DKK1C2500188.