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 0x909a616f1c69e642c46186761d7760bab027ee43717a88294d590724e64a5294. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b8ab7e8-57e0-41dd-abeb-8c52766d9a73.json and https://artists.proofprofile.net/proofs/artist/1b8ab7e8-57e0-41dd-abeb-8c52766d9a73.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 0x575f955ae5c68b5fc076310ec883861deaa9ca3e2577405c035a72d391b9130d. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/QMDA62318933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f387bed31899d5083faabb8aa26e7b65150dc48b785c1bbddd92a9722dc419f. 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/QMDA62318935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774dbbea6f8a7763e03ee97c87ed136fd53824f62b89f77f2b35c773add9276a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMDA62318937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9565716dffceb0923763c0c04f019c0d68a764f807562ded6ef60ac914fba237. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P42319586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956254308af24e1dd3a56dada9be782b91837ca9d8b246f801f79a2dc77d09a8. 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/QMDA62318939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd375d67784b5864c514caa412c6a409b336fc739c04fd45705d045b060a34b9c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMDA62318940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848ab7f36c9c3fdf2d3636e4f7af06caed5a01a5e04becf444da652a5bce1829. 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/QMDA62318943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b40fe523bd64d6241d2608df53fa8c21ce274cf6de4d65e61854c3556900a1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMDA62318945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426f5d69c520270a1a3317eb0f051c1c723ac8a62227b3ca3c43a2f275443b1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMBZ92306888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32827a593f5f55189491ccc4ecc47f59e120204cd8d848c632f1a8a2854129c3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA62318947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33922f0ea5aa6d7e69c54532e214e70a82f8df752991b8fe8fb83368e0b6bd7. 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/QM6MZ2103218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8eda2ad53d7bf0287d583a1049eec6a0ac5e95e498b5ff6bc6447dde3af2f1. 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/QM6P42176068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea20af275d6b84760fbf9328e0c4b5bd96a62d356c6775f420c1c719d83005d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM4TW2216913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a56a7e89d1530a397207904815d0a7784ae5e5f27d938519bbc1efec178ae26. 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/QMDA72174598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d2d3b36ae8e9c2d000d47684e9bbae471791609a1b3f636e814998a141fae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2216914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2e090fd3f0f43b1ff896839e8859460af01c29299767b1ddb97b822a4e813. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM4TW2216915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57caebf0a85d66bdde899ab98ec62c99a7ad87485f1968f7feed8d09ac280ae. 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/QM4TW2216916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5fb13d4269efff7a0843b8933d77afe1348372de86ff43036f383e31b5eb69. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QMDA62157861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb0f78a115804a823590995eeda97fbbe42cf226dccec266910af0f91a3725d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TW2216917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43a3ded6a01f6ffe1c25fc25d410bd929b45752d5d2eb9af3c1e28dd59d6544. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QM4TW2216918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32827a593f5f55189491ccc4ecc47f59e120204cd8d848c632f1a8a2854129c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62318947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426f5d69c520270a1a3317eb0f051c1c723ac8a62227b3ca3c43a2f275443b1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMBZ92306888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9565716dffceb0923763c0c04f019c0d68a764f807562ded6ef60ac914fba237. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6P42319586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93032b3dfec0a5fc6521f1d73a2cc981671a22c13819c288825a832fed555de. 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/QM4TW2294110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8a77ee6339314ad01e475687241fcb9179b45d7a803233df2213b1f01f9ed9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW2013785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44592f1b267e7a601c4e92143cc7e59303a2405bb3c2522a83dd26266254ee76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2013786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d3eebd9af07cc2924346a07836636d756968c00b3018da105a28968038e67. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QM4TW2013787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd2c1cc09984f426ea506b30cc7eff3c3d36e0c3dec58aeaf9bf9e046229fe9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TW2013788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b83de49c4fabebc163f0cf94fbfdab30a7daa190d8bac1ffbe72e279a9c0b36. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QM4TW1919238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f8af2b63c4890400f68dc4da1e70695cd37b686df0b891698537ca25027202. 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/QM4TW1919239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cef07f3383fd9565ec407b6fc9d016c135b34684c373aa4429c8628fd4b44a. 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/QM4TW1919240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1972637ce1138c305556646b30c576d99c553d3b90a73e852bda6e71c28731. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QM4TW1919241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31843b4be1eaf542eb04571d05404df271834de1bda37ad285e75e1fd1a2e66. 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/QM4TW1919242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f1c9566d7ec964093bc3882db9ca4538cb746d2f64f9113c7c903342d2d270. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW1839599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd55c30fda0fad1bf0b9fabfa4f7f1ad5a0d6b29d785a6420cc0069b1d52ec. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TW1839600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eff177e072af3db88188c59daaf495789992c3fe624f5c77a0b4977c3bc96e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM4TW1839601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa9f9b038a811c4618ca918a4f059abe62fd8637f62f94591f6bfa0068a895. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM4TW1839602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a00352d7f8deff7d8c66caeb2bf87105a7b363f92c5bf3d210f362dad91d7f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ651706394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d29e9146d25db547c1130723ab3455dac84d4a4ad6255aa8f1023c8d22d2a25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ651706395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffe0170b4765d6184bdd0e16eb952c8b5b20622d820ccabfcea6280d305f3eb. 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/DEZ651706398.