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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec55d5a45fb126cf38ac1ef13a4fb6781565e5125cff7930889c1b9315d821. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e37a4d2-43bf-4e5e-a19f-ec33d0c59ccc.json and https://artists.proofprofile.net/proofs/artist/0e37a4d2-43bf-4e5e-a19f-ec33d0c59ccc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60df3c78c91327198060e9468333f57fd72b8da777f0c6e9ea97ea6877f4d023. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFVV1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa33a3583898054528a1b2550147d56dbbcff859b1bb52f78c25e28b37bd3ef. 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/QMFVV1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad300712f5cb75c9cbc03acf956c32ff8ecc0ded7fa2d231baa7976f986962f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFVV1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ce239ae57d54b7adff60f88efd45024c4c60aacf3455d2c5b713f5316a7140. 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/QMFVV1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec12c35c89edfd8de2a3a1a0c1fad99a49154221955d47aa25b2090f81be95e. 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/QMFVV1300002.
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 0x0f5482feacdc6608a5ccd8347ac4e99ff82fb77a8132c9557ce654b358bb5056. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMFVV1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0868c84b1ea4d540bfd766746248d9f9f4197025bc2deccb66aee449bb180cb5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QMFVV1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a59d26464fecee1ff40019e7e892454591316233ff2899e9fb86da0c12c03f2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USTCB0914458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeed03e89e1274047d5d3bfb7931d5243cff85bbd634d3ff4bd658f11b3f077. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USTCB0914453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed04a6a76d3656dc39c5c83488cd1153f69c1c43029b6e1e3adec1e44b6a04a. 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/USTCB0914455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba83ed0f80be2f6c2887a21ee46cc5f38bc92016d4733e2f1e3cbbfd713f3683. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USTCB0914456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b59199d6451cca44c8e9cf3a0eb228f541e09cda3d40f6db3b9eb2829af7b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USTCB0914460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68320995bee08133bd93421f5ade45b1e94881798e1632f7adc134d3670773c. 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/QZCE61884834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad41094ee02832ce78eebff9a9d1f78dbbe7ee52f42ffc59e86c073d83f90837. 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/QZCE61892316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf952c7503025fe45a406a02795a31066870fa90acf5280573d6ee8abb9cea436. 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/QZCE61892317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77bff83c5f6f1a8d3719ece5b0e6f3e8c374a9bb2e0599d23d628cbd8b917b5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZCE61892318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4a37cf40fdc51b08bdaee0d7c025d5c5d192f49cd731bf127d09deabe15486. 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/QZCE61892324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea8683fd3c9ced997987b1f2e2fa1e3203cf6bacf567b6d006bf7cc0ecfead2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZCE61892311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c9baaf9bfac0e8651f3be485e0711d2cbd711b01dcc4467226b61d29e95f68. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QZCE61892312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f98a6b151146a91eef8be627a605389caf0ba1f4c01794e0fd8deee40cabc9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZCE61892313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff67ed5ce96534c38a586e913eee1abef52d616f9a8640e1c6d587e1013683fa. 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/QZCE61892314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7afbf9025a6f9442f4f732e1ead8c783e02454f66452fee2aeb2daf4c6dcfb7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZCE61892315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c6d7e0fbf28f92262bb1ff2bc917f7770859815295cefde61885f0d17a26c8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZCE61892320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e24aa570f917bfa2e6e5900a831cd36945e2379db3ffe696e8d0ac631b4aeb9. 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/QZCE61892323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6642e38c8bc773dc3288f7c09bec91103e20c66b07714113a6b64dad2eb8c9df. 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/QZCE61893010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5139f822a2217434fb0ee3f74006775ad77caa245c47f7bf475b669aadc4ef93. 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/QZCE61893011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84410cb8131c051d49161e553fb20e8705dc4a11dbd88366f14a90bc82feea06. 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/QZCE61893012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10efd0290e7f3d321f34b3df812e43f6d180f33b3b80451208b65961776b7dd6. 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/QZCE61893013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201e79205913e71c91d455e8bf50c2c3c0b605e512b9968d771abbe82e651b2c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZCE61893014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127b03e185df5d53dddd5f48b64118b0dac41f9f2c989036f7f8ab3f6468357. 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/QZCE61893015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039f9fe0f10ec5a285fbdabadf615fc67ec77fdc983847270c4277b51043e7a. 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/QZCE61893016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a5177504b6724efc302e57e7295946fef3dfe1f1fae45845eba2db558b266a. 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/QZCE61893017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519de2c3ea2b6d13181118da78d500f15edea30104305e51c41c60ea0b1f3aa6. 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/QZCE61893018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e37f456edbacf7cdb81e159eb1dad77b785ab8509abcc5ecc18eb9bf8bd1d16. 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/QZCE61893019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eac757943b482bf7c547019ea78cc14c21de84e28db926e15460f93023b16c. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/QZCE61893009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847d0673dfb8a0491c2ab7b265ca831287ec8bb5733781d55b3025870171e7da. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZCE61893020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5c88e82dd111285da482ef43b67cf910771778c70c678cdb2f03349a886389. 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/USTC60874282.