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 0x7736cc250107b106a630f86b57b22d293f2944efe8472db2f319d61c3d1c8ca6. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe23be66-75e1-4d72-9172-cc0789df8450.json and https://artists.proofprofile.net/proofs/artist/fe23be66-75e1-4d72-9172-cc0789df8450.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 0xa38d14490d2a11ff02a4dced116b49298b9a5518b27b16cd31aef2fbac236f41. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4Q1973362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d7c335384c476694fb664c2637757266069fd5d8dd13882e9d3f0d4c0efa3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USL4Q1973363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80b93ce2539d8ee554dad37205aef4837a894fe58d636ab7d988669b98b5d99. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4Q1973364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b4b7eacec2438465c94dab4853b395dd674227a149192ce1148980b12c39c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USL4Q1973365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f2d5a858355c47e595364c96e70318624f9a030519cb385bf6daf5f50e7268. 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/USL4Q1973366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9172b11f5e70e490d227e88d3c3ccdf900186991c0fa7419270daf0e43302326. 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/USL4Q1973367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744207391b12481d91c18a57655e21ae2702971b1eb9532fc0d9e52e81b927c3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USL4Q1973370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a508abf31cfcade5f5108ab56c0c0b827ece3cfe329d65940e1fbfa636a4e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:00Z), 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/USL4Q1973371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cb77355bd23aeef2d2be339513e734db54deddb3f30fbc622aa08c3c4c7c4e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USL4Q1973373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58912ea09ce739d2fbb744a5ff0a068366f6e7335e36be87d1e5626c60be4203. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE6SA2266982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ffa93866f30ba9525dd91ec8bcc1c3fb1a2d3fd6e1003df3b7d034c492434. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2266985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8320dc77111295432d43b59b7c000eaea756c274286daf9d1d2aab208e0c16e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6SA2266986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cfa2fb98390b0f4995afc47143d4da91a1da683c60a31038e4933d4b7d8123. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6SA2266983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc896bd40553029780c18025ab26f31494bcae0b8df2ca3a6a7ae24d1aab73ad8. 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/SE6SA2266981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914ae5912e15a39e7ed75de2e29e6dd230946bccad3f98885f555bc48745a4e9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:36Z), 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/SE6SA2266991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef301d17f34c31e29a642cf30d0a53dd1fd079e752630de4ac8a809bd317cb83. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:49Z), 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/SE6SA2266989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833142969d5709e3a92914bf1e7a88deb16636d78c8bf162c1c1eaa6ca5b01c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:24Z), 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/SE6SA2266992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865916c742df34b17c1ff8ef884c1e030034198683829d77f9c9cd1eb493a128. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE66N2276566.