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 0xb06e1e7de3a132cecfb93a10255dc74839d8d001e46f1be3b6b459054f7f179c. 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/4c262718-bf96-449e-9be2-e17b34a26ddf.json and https://artists.proofprofile.net/proofs/artist/4c262718-bf96-449e-9be2-e17b34a26ddf.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 0x2b16198d43826a92fb25ff2aaaa14e684cb5378fa0d0787a0e2cbc357ba02f74. 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/USCGH1612021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5b296e1538c77381dde0623fae183b28071515eb3351cfaba1fbf8410d6016. 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/USCGH1612022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc90b99ef0e624963aa0a4ffacdeaeb2f55ba8607ff866f16029bc81a469b4c. 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/USCGH1612023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99256013996dcec0bd66d2993b76aa4b85597982d3f004ce89e207a2490737b4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGH1612024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17354b227a7c69642235901686deaeca6180d67466cc365403fdc141760ea2. 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/USCGH1612025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f516c450c8bf6df675d5fbb2aef99f0bd308a0b569420f18ce4cdc72202fab9. 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/USCGH1612026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6c5b2c619f6d1f9eaf1c52ac8d60b1c1c530672bf3c1cc4bbfa45e25f472b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH1612027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1e647923f7320dd52554e8720ea654983ecb07559618398c82e3a941d9cdd9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USCGH1612028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f081b06adcca4a5322d3f91f69c99a26547541a45c7107c33d6175a31615e59. 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/USCGH1038005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6300ed7acabf02938e0209573357bf6e5eeb46f7ec2c8001a69034e8b7ba3765. 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/USCGH1038006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0947fbce5bb7f20943c29726f2e23a0cdcf4919a1ebaa9d18cb58428ab1e9. 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/USCGH1038007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8328db9746d00d05120293b05f95d3c6b1b3c7de7c341b440add2971977ba6. 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/USCGH1038008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6517550d95cb26dff49faa8377471943b584d5508bf0dabe0ef7c26858564b. 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/USCGH1038009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c84005a33ad4b062e99802c1d7086292f1b822e6f66f99bd02b1d5f8819689f. 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/USCGH1038010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c031938b28a216e814049739f90551f847bac273f0986293376b9d9d4242e2. 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/USCGH1038011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6d26c34e9dcd5bf6dcd9368ba8bcf922d9fd5fb768555684bbf464c2fd566a. 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/USCGH1038012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9927d09ed585b5ef16a2cdbcdb3726a19b1489be29637ca6e9fd62f12a7cf4d2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCGH1038013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f134580bc1f572a1ce9afe629477c127e33b598713c43efb96579cca020394. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH1038014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874ae5c251ac4d080616f4b7beb6fcd2db59709070678cc76e6165a8ac7920fd. 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/USCGJ0806234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a441f5c148f28bc9699d2c1703d3867dbcc85e7f48b7052297cef412dd883. 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/USCGJ0806235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca73a8a1f503ade991b006b86c5986855a5b5b33d598d533367b8e80b8dea5a. 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/USCGJ0806236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044873b96f774893077041bbdc5e43387c7a6d32e2b11c0a08bfbaada3a14cdc. 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/USCGJ0806237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48558050f754e618e5a9b242da32d058e250249e40ca5720740aabb560d6c9e3. 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/USCGJ0806238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8fe856fd83eb334cdfdc16852b41268fd66ffa58e1242a8501fd76d915b804. 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/USCGJ0806239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12258d8800ad27b386c07929f900f04f28ec401f90e658d9938be6482eb3c6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGJ0806240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c9c75c26fafd78e52f38537f0b4029dcf9b12a666a64d7c0ff12563ef0cf9. 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/USCGJ0806241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf020af86c7dfa6d5a3b7c00bbb086f5b2fe6decc2b9a2d8a7ebfa7dd09b14e9e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USCGJ0864718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd96a0342e8b17356666ce4363a1bb4933eacede1157f2d5d3d0efac0d706ac. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USCGJ0864719.