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 0xb0c0a0ee903e9c771c2f8336a2732156f80489c32942be7cb58773e6af5d9a7c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ded1fe15-e20f-43fa-b19e-b101286f66e7.json and https://artists.proofprofile.net/proofs/artist/ded1fe15-e20f-43fa-b19e-b101286f66e7.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 0x5e0dbe3d8c35f59ecd9dc4db6f956c2981e8c224ef6af5063d6b701cc14a880b. 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/TCJPC2454201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4101144b29e01a5383b0d7b159a192828859843477fc0ceccec2806a9ca6524a. 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/TCJPC2454912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627fe0c6b83bac1578725d5f9a8af23f1aa1eb30fc9226d3da93f9ec1cca9f62. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPC2454919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf195730e2df3ce5372ef30b5a51861bf0f8b28eebd316dde435bbcb4defffd3e. 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/TCJPC2454928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0511963f909969c468ca92fa4b1d22c015a8cb11cdfe0f3b54359bb9a264d6e2. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCJPC2454933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2e6541af809c27609409e2f0b7693a023b8ab8c797f78498eff64f246f44e. 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/TCJPC2454941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1be1bc1447205c91fcba034862416a1ffb0d8f5bb4d95cf308b71e59fb73cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPC2454945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0dbe3d8c35f59ecd9dc4db6f956c2981e8c224ef6af5063d6b701cc14a880b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPC2454201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4101144b29e01a5383b0d7b159a192828859843477fc0ceccec2806a9ca6524a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPC2454912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627fe0c6b83bac1578725d5f9a8af23f1aa1eb30fc9226d3da93f9ec1cca9f62. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCJPC2454919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf195730e2df3ce5372ef30b5a51861bf0f8b28eebd316dde435bbcb4defffd3e. 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/TCJPC2454928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0511963f909969c468ca92fa4b1d22c015a8cb11cdfe0f3b54359bb9a264d6e2. 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/TCJPC2454933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2e6541af809c27609409e2f0b7693a023b8ab8c797f78498eff64f246f44e. 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/TCJPC2454941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1be1bc1447205c91fcba034862416a1ffb0d8f5bb4d95cf308b71e59fb73cd. 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/TCJPC2454945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce669710338127b32d2665f88436bb635b611d3779a19e83b153210d03afbc86. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPC2454951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba745ba204dbe193ef105ca6e842c8ecb4d60adc46569341811eee4daee225. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCJPC2454956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa459723ba727d4eb28b773d174d56a1cbb70f2d4f0757d140791a6b82602f17. 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/TCJPC2454966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44b3a6543d578a0cde883dd00745fb3baf35217ec36adb782afe1b7353b2562. 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/TCJPC2499021.