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 0x1b93c513afa0e1bf171d87aedaa5a524f9b28d0157f420b95832eede004df903. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11b16e8a-ae79-4b7f-91e2-9a71fa0a1ebc.json and https://artists.proofprofile.net/proofs/artist/11b16e8a-ae79-4b7f-91e2-9a71fa0a1ebc.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 0x23b9dd6a499581bfa03420b1c32d69666ef1319a60f30da4f620b7e184af3f5c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:01Z), 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/QZDA72402174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c6eb7058486bc3894ac3d50bae18cebff4775464caf797ee3cd32240efe07. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:02Z), 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/QZWFP2458920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503efd9e9f28cc9d1cfa0f8ab2f31d559ca4421ac02d2c1c17403decdd426a81. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFS2401489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d01426801bdcdd449b6e93490726f9ca673590db51d513570f79a1c0514b8cd. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ7S2498906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9f5ab1e2f727541f23c9e3b89d7b5607179b15a78ad74452a8949490fe5999. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ7S2498909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ad575f0d4468e60f53e279e36126e4c4893fddc5dfee5660df2bf353dc2581. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZZ7S2498910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa77abcfef8a48b44357e6510a087e16da88a6fd9986e9b6da201498577d344. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7S2498911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3470b50a753d5f904b5f6249ef6e92db3d94e50fff1fda13042e4f3a01b81ff8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7S2498914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b702016458abdeaa1bfb4d507b45dc88d538ac6f27b764ee80fb1c26f2dc5c6. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZZ7S2498918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98138798934fa737430c8e693ed88d68e0b519d5a04d272888e0f7405cfd6a84. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN62557706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb85d5c731548375812cfe0fae407c7120d0c1d9d024bd095b5cf8b28a2b150. 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/QZHN62557707.