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 0x435681f1200fc4812b051f796f30678c47750f79243732e5a0d83f38b171d216. 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/cb25627f-c488-4163-a081-386fc2db1d43.json and https://artists.proofprofile.net/proofs/artist/cb25627f-c488-4163-a081-386fc2db1d43.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 0x8e795f47bd5e2ae0eafff153c1c165ae9d51b84f707eb6c50218349af6e31bab. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:21Z), 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/DGA0L2493108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddfc8def8dc1305e418f11873b2bed4e383f47ef4821b557bf735d221476076. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBLLT1707282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cbb0a7b35caac13aa9a2d38e4815840521a289abb698214488e593108aaccf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INO131603276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cbb0a7b35caac13aa9a2d38e4815840521a289abb698214488e593108aaccf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INO131603276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e592b8a78147158e982719bfbe901138b1c2eafdd12f04512c73fff177a41. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLLT1904195.
Malaal Kya Huwa (Live at G5a Foundation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9283806da0e2d7ace904404fa18e245394af39e5cb186428beef87159fbc80b0. 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/FR26V2029993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1f969850938a530877b0c31c9455b4f3c704381bcb2c92f7cfc2f22120f146. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR96X2187490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d3c736edb2b8da67d83a1e245476ac7b502c1264a1b7590d6536e5cf3603d2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR96X2187491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049cf5c66717902d83e97d32c95e0e11b40127260eedbe4097c609d0befe0f33. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FRS182137981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a096251af659befd289c33bee412898bb1739a1c0ece11156bca1017c9e2251. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INUM72300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81877824ea4a1b483ae5961651d1b8edc2e564c5249bc947b21dec994ede1ad0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:10:07Z), 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/DGA0H2419421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bb88403e3eec52501f0253d959106d33803f27815b965ab13c7bcf15b18c51. 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/TCAJG2501137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f9f14839f9b789a3993d0cb9a06193f49d4ede11f5d04dcac247c456fdfded. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0R2477833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfa915252aae3c99d1d8c5b949fb9c28d487d284493920be073ac8853edc3aa. 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/DGA0R2477834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be76c74d57ea3bb5facb10a8535472cb74c8b0cdea9b7db59c386f8c1aab279. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2477835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4832601162242d716613a3b428b548d5b81a062507bc63bb99126b932765fa4. 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/DGA0R2477836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b7d3dc56a97a83e48d1309dcca1bece9f1fd0c0a23b3927366d3f1c6786906. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/INUM72300430.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch