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 0x2cdd36fb993379c6d6d4ee8ca19bb70f52373ff1edfce1b3659410ca66ee8e36. 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/7f41701d-fb7b-411b-af48-d7845b24b14e.json and https://artists.proofprofile.net/proofs/artist/7f41701d-fb7b-411b-af48-d7845b24b14e.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 0x6bbdf4818f4d6da63be23164d7abda5f4c8577c117fd75b61976d8ed201a3344. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/UKXN22155526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cbc9808cd7f11ce914ce48461c605d9cb6cccd7bfec58264e5edc25a5cf33a. 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/UKXN22155527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec55c59129b43a80e0b40464f05b9a504c4291a3f8e50306f0b45fcabec435a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKXN22155542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d70d9cab8f67970eee6f2feb92824b85a91df5481a4fea05f00ee90ab40de3. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/UKXN22155539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8481ddea4066e4ba421cf6f845820124dc967ba79262346e0ca8a6f56babd00b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMEZE2137876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5922ed4feead95f4c9f96b966403f86049f7411bf3046efcdafc74421ae4ca05. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKXN22155537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16175235f68b623aa981ed48c4fd356a6c9d75b9b0839b47ee2cb87511f7906f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/UKXN22155532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6fc84f9e797ba1bc5c9ff2158fab45ea74fb398aceb47ac34350454ce72ec3. 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/UKXN22155531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007c290fca1806c370ed66dd795d5af0e82f58f2c4d25889eb3c15aee8d542c4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2435423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed33588e9b364b30baefc7b253b8eadc3df4979e7744d985029a7ba6592007ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2341580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdc776a9a5045a637995ca03b0147763d1ff68eb30d418c9435930111284ebc. 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/USA2P2339915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d1439e4c21a09ee6886574c7bcb53a37f86a250ceef77fe7f82f641d5c14c2. 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/USA2P2335765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378539855916d90ccd5804de7876e2be0a294d0f47f02f7278e6f1c9326e523a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2335761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd47c009763cb68ff93d189b75655daf98b03c63ba4dd8e3f94314d0ba0d9bc. 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/QZDQH2362269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28259a88cfc45e82f4f6f8803f42222526ee70df7e5a65ff17571e7e643cf175. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZDQH2356827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8ccc2e06f0fde2ba6103246c427a52d11ad7ff462efa81370c8b2bf7372e52. 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/UKXN22240616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02fc31c7284cb7b8d4dc835856354087b8e361ea96daaa9216f89d372fd404b. 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/TCAGG2230517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bafdda95e944696b7dd044f2d53ba9648f0a5fe9f1b7ee7a0107128a53ed68. 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/GBLFP2239240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e219c0fd4cb43e4f48f9444e49431ded8538bf89e56469ceb28565d1a0cab8. 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/GX53U2066216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fbbd000d0cee5f72640074521a7cd3d42dc6ce38b67b9034911d469d567f9b. 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/QMEZE2177820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5af7c0d1c6ceaa8c4db7038d3f771aa6cda5cb5047c2e0abc326e57fba30e5. 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/QMEZE2168902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c143f28e595581ea12e8f616c88c4b2d28b791307c55f8a1534644691dd2b. 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/QMEZE2168881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8481ddea4066e4ba421cf6f845820124dc967ba79262346e0ca8a6f56babd00b. 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/QMEZE2137876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea476988b53557b301561e6f215ae32c0947c87ee72e13b382cba447106c712d. 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/QMEZE1781420.