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 0xc34420b64155340c022b0db62ddcb442a7cf24ffe29053742333f89274193ab3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d91ed121-3aaa-4c37-8c00-242c52931772.json and https://artists.proofprofile.net/proofs/artist/d91ed121-3aaa-4c37-8c00-242c52931772.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 0xcf824258b7f5037ced62545d10db7eff3ce3465fce9e7498a7f32811aecc62be. 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/ISA110201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922472fed97832cf0789f79937343980cbb43122955c2a3de29285c1e3b8065c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ISA110201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f14307cbbe9f5bb8bdcef4d89ecfad51a02ff7007c30e2dd86d797684fd5cb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ISA110201074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d5f000f637285a4e74f9913d1a759753fb2c4b740e5e26c68fcc11e3fe0048. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ISA110201075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc30c3491e92bd4e3a26022b1c695c133b598a17c46b1609034e13479a988ad. 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/ISA110201076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757cc365911c4825b75cfe5a5cca31471d02bf9badd016a8bdc0e1bc23060131. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ISA110201077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d98d6af5481fd3825f99a9e1ce47370921d24d4067080e1ec23831ddd4dbfc1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ISA110201078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b038b1b2cb880ee5366a151825a31b5975f682eb338fcae2d9ba85af9408680. 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/ISA110201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c8a9f9170e15004be5520d3ca910e57d642a018922386e39b949a2b0ae467b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:50Z), 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/ISA110201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d03b7ba62f24980df7ab18d07b2bf157443ca59b56c60ff18cf13528c406f6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:41Z), 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/ISA110201081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f34fa7558e838100c4e8dca73be0a98beed48a2dbb0d45daa369a5ae80db834. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:37Z), 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/ISA110201082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5494509e127e393012034dd8694a831f781bc80644c21535250c65bca434c723. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ISA110201083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9f1b09f308fba8058db422479ab70ff9c84014046930d150e5224816a15092. 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/ISA110201084.