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 0xde0fa415809e28ff3114d95f97bd24aca3b3703de1a110a5b3501f6ebf6d4d38. 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/0804f052-c97e-46eb-a021-b395186036c6.json and https://artists.proofprofile.net/proofs/artist/0804f052-c97e-46eb-a021-b395186036c6.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 0x8cc03b9458781f99692f9563d36245a1277f04182357d324f4b5f6defcda5f36. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBSMU2454392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa36aa0c5152d37365d208464a297fd421823283af37c0bc1e47a7250ba3a52. 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/GBSMU2454394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcc98ef88038248def6b3c19a520606455ccff78a34a11b23f91f90a6f62f73. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBSMU2454396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddcf6d82c5bf191a0e04d50e42fddacf150b2cefccc4e4fdc5d42784f17a312. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AU3O01702358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3ffc1f154ab2adbd05013b42e8fa0e4eda939887a1385ef88f33512103a275. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AU3O01702359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169d8475b7063f61dce01d5acace110f499a74989127335834c9d4c4113210c0. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/AU3O01702360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1f72cc5ec4b79c23f21fa14b1057e93741caa7c8b6b7de58380a0a04a771e. 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/AU3O01702363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd341c0646188a881e11194962c26ed67376240fbf19db7690c0c065568149250. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/AUNCC1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2b6a880f9f51c847442977566050afb3675885e2922be8d7ed233c8983d9fb. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/AUNCC1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d6c0caa18dd0928b27bf44125f585ed84ef859ea8ceb0f4817422fd237f1d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/AUNCC1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36618f45d2970b75c387bd704f87b7e468242e7e953c77209f7e49da1d14951. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUNCC1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa02643f3d170ff58f059cb84500751ab6b9f63f3d5bdcde8238aa4272d22de. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUNCC1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a87fbba0c17b54a24938007b8f7ce3294b64ab43ae12affc8d763da4021611e. 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/AUNCC1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb0659bb7d777fb0ea45882825d27cd545790192e651d98a01815303cd7b713. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUNCC1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74327783761d1fbd151b982c41187b0af7befaf65723e302364f33fcc894bf2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUNCC1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb666a478568368278fb73aa7303094c05343ccba1ab9ff8b632a669f8218d32. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/AUNCC1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7099e0252b7362e03ffac935823686d47f31c240cc4dff33cd19519e25287a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUNCC1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213338fce38b6f39bededcf32f66b4871d99443719304f60355fb71e0b7534d4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/AUNCC2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645ee9ebc2c96430157d9e3efb7081b9ac09332e1d84227c44b579a51000e48. 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/AUNCC2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf864668d3d05292a962dfcd1a982456f72f5774d7bb8ef9fd762b5b54491554a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AUNCC2300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d40b8857e1fe231bad7fb45063b40a26aa7429e1f10103da4ecd5c91dda767. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/AUNCC2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c179c35bc2567ccb5e95268d4c98f38a428b9575439b1bd7c01eef3b2d92483. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/AUNCC2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645ee9ebc2c96430157d9e3efb7081b9ac09332e1d84227c44b579a51000e48. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/AUNCC2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd121d73f402ac264a09206cedda26b58bfdce2a20b0e6efdc617881f8c917de. 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/AUNCC2300123.