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 0xb6160c91ba104573f9628a1ad0b4e09210467da9e0fea1ae522a9856d1f76f20. 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/c604b094-8e36-4ddc-b9ce-2f05c1490a27.json and https://artists.proofprofile.net/proofs/artist/c604b094-8e36-4ddc-b9ce-2f05c1490a27.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 0xb63ceadaf3214e3580d1219383a0b23bc9978b864d8b183955d0303b1e6faeeb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBFBC2302127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5315cf06248e70cb2e62dbbd3e0b65097c5390099be75e12361279ef107960d6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBFBC2302128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491ab96019f83c983fc4688a1843509c865ff62d73e7a3b4f88197ac5dde6ba3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBFBC2302132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed759504081638e86cf1af1438d907373561980c372e02cbf2a96438b7f67503. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBFBC2302126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af02b56ea774682077f0b0a7b82aef025676f40e1c5619c1263ce14888542cc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBFBC2302125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ea82c4dbaacf27d5abbb0f93adefcf43a237308ee276dfbbd685b3c53d16a6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:24Z), 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/GBFBC2302129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347e1a281c75f43172f5a7ad3818131bd04d27c4bd21dd61a864582fb1dcf2e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBFBC2302153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766ce37c7382417db7a4df052e19236afa150d21d2c12166e06c4efab4d4cf38. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBFBC2302134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e35727f7632b8789993e74484d9c9533e319fb19dfa21d483d63791981120fe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:43Z), 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/GBFBC2502209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2aa777d85e5bba314412abd86d942537fe5a18f7850665d535d94e17b5064c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11618087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dc46e88adf75d0414fd69ac71ed62f3af37235d96e5512d3afd8ba714928c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLQ7C1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee679342c4fe0a7b3a5329e8634d911f16d49cb05ac012665942d587964b9e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLQ7C1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e013ffa76600d07be70cba863fe5fd24c5f8cad0c803def91b3092f17d55f9e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR4EO1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed50cb13bf34cc21ca0f489c8fcbaf0802a94de5b89ffcabc7f2e4051a49638d. 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/FR4EO1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628a28fda60c3e1662dc5214b41e75399c8f8af8b79d36e0d565a531aab5f998. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR4EO1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed50cb13bf34cc21ca0f489c8fcbaf0802a94de5b89ffcabc7f2e4051a49638d. 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/FR4EO1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290303ad873d8fe13da2a414a87a4dd1a10889722db58c5353d4707ebf4a8686. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBFBC1401181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be3c76f23dd924380014cdc40691b730818a721bf588f91d91589b86c57fef. 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/NLQ7C2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770dd955fb8b0a56e83cdb47e8c38a5fdb5bbee5ae40ef37dee53c4c4800637b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLQ7C1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4362bcf57dc63e6fc37ae38c136a265a6af340e3117e0a48ee1327c42ff3dde0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLQ7C2300027.