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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45a712108ec4e48ae75e51bf1fae5f817ef7eb253d84d2239d1da60f91bf62e. 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/1706114e-eb8e-4495-8fc8-fc9be7abfe55.json and https://artists.proofprofile.net/proofs/artist/1706114e-eb8e-4495-8fc8-fc9be7abfe55.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf3d53e5522ee0a204131a2ec1fac2555eb5515a7977e2b0c83b05315fe415. 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/BEW161715901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1c17c91d7345aee0f668c8ee8b3fdc1e5bf7efeef40272b689159177010e87. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEW161715903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecbec7b446636e342e74a8845f3f753c162678b7a4d3d919947f43c517f9384. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BEW161715904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15eb231e3c1d1f1a389a24e9627cc23e9fa38ec17de34e6133575b666f6968b. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/BEW161715906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f76c021989e88809564714ce4e43ce4a7017c3709d80ac21a989b411f17166. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEW161715902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a19a85a0b49859cfdb55831b8c861dfbb7206b15961b546e68f41194dbe65. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BEW161715905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d53f954f639b3a18761958c52e0550dac428bed21f19efb94a666e4b1b8f0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BEW161715907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730fc7e01426d2a15901f4efba349a65323436a8db3590b2defcb12b612fac5f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEW161916205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe134173c48da384cb7ced3eefce7483a7517658e6c62f024fb99413dc08882. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BEW162116402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1867a1839bb4b6da9300af209c8bcb921c20a097c8a56a86af7b4ab842c6f342. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BEW162116405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1867a1839bb4b6da9300af209c8bcb921c20a097c8a56a86af7b4ab842c6f342. 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/BEW162116405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531753deaa4f49c6842e6249f8589343f4d13e5269ed34e1a02dbc93f5343d08. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE5ZV2318701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aac24c505550d0f3e4d2a2cc3f62d1274c3b75dfc07cf0d659e050c05c216f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLC242100917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4bd4fe8486750f943cf3f1b52da7683dbf1690b37c29b4d474738f7bb889ef. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NLC242100918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723478a683f854ebcf321cefe3062df89400bca2bf01b62ce7f321093d1c8277. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NLC242100920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487fb41c1a3649e696dbb3fe988735c5380d185327dae584e74e7aa014153887. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLC242100919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f21d93d3969fc9f00a6124734a953f2e234975fd79974dc583f4e774765a8e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCADM1888144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cee486ed8155f02307efdb93525b45cbaa20262e5121ac90452e77f6310801. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZFZ32528411.