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 0x42f8cdd528fc4967053387ce2e3b363e98bdd0e0fdb91d45aee6bcfc4119d977. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c293c22e-b186-4452-8862-8253b4854245.json and https://artists.proofprofile.net/proofs/artist/c293c22e-b186-4452-8862-8253b4854245.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 0x66f167426446252324fcd205cec5cb04f787cd6d8b73c83950874cdf2303cbae. 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/QZS662208274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1167a900ec228f46356a18e807fc055df2dce03ece8308488ac41b615d740f. 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/QZMHL2255985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e38c99936335171aae96b919d8e313042c41f4708aaaa5f253021719ecd42. 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/QZKDK2241860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a58abd61db01a2078cc2a2492e420d79783c0a57ce4127fef69450cd7018878. 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/QZMHM2269607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd604fabc2d75284b5088a0854243b188c0164f1a61ac0c7b3cf538d3fff913b2. 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/QZS662271399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9702c4423f19a1c13b9cf02c061d63e8148a8887fd51a1d71bee701c4e548044. 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/QZS672264146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd43e6dd4a883bc81655d4534c0392dab23c5f4f7c8a24ab94da78024fa8fd3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS642253322.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371cb138a4cabdf9ed70df8fa7aeed6af721c3946fa953ef87091fa2015635b1. 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/QZNWU2054153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3206f7b45d16068cdb251991613518bb508a888f6a1c3ce432fee8faaa985f0. 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/QZNWU2054154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb9c06cea11654b061e6d25885d48dc315b70871432124afa4f8ee8fe409d93. 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/QZNWU2054155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c57d7189f31135bdb61eb3e8f79af4d8804965d79562b9b5faaa0516b5acbb. 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/QZNWU2054156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd1c0372e68242e6720f967f6cd63249fe65d552ebdb915ce8742bffbbad1fc. 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/QZNWU2054157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f5874ac9fefc9ee7917d4bcf244c06faa7e50031b38880ef33533eda92736. 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/QZNWU2054158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f000b166fe4e55b77e16e5d531e34144ce1b077d768d72c7ddc30c8909b8c9. 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/QZNWU2054159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3a5939f8a92927b30db3c0dff431c3c52c317d1dc4b9b814387fca2fe30e1. 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/QZFZ31948312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db34977c1081a3595976309486fdc29241a2c4d9fd3b6da12efef79e92805f9. 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/QZFZ31948313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff080f62d0c9083a3fe7fd4fd4a31eba67ea39aeb53fccd7fc0fdc1c8f5363d7. 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/QZFZ31948314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4708de34b603f61fb1135d2af79328fb0b7bdf0dea47688c94324c7288893b64. 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/QZFZ31948315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e971a2aebaf54d53a902dbc043f3c04ebf7b5e9e69545391e2402cfac28c12e. 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/QZFZ31948316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e59ce1bbd120c478ed8d0009f9a0d0dd4d4aa4eb74f17c8d20f9bc52d43c6c3. 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/QZFZ31948319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8843185763f2158afa13bd6e2ec603b28c2aa2fd21008d8ef206f12e023cda. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFZ31948310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb35c07ac0d59c2963ae3d1636d6fedd6c09b68814584b0d9b1a7b6f3680fc1. 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/QZFZ31948311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef748a6df51cf159ba3e6c2d8b4c8966dbbdf05cc7ec35679c3cce2ffe25e87. 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/QZFZ31948317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c7fe804d0bfc43d6b7326ade5640f3f40ff2c52f7673bf11afd7f131e8034. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZFZ31948318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d2bd33071612d0b1eed8fae770a6314b2eeb55dbaea4bf1b65cb9181d364f. 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/QZHNC1969210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad3f20c569a8cd9d878f279f164a85941a931e880375eb19528e95a4707a0a. 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/QZHN41933558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43104b69c3f7c4c8f4576e018e8cada5e8076dae13e6b5c330f05af236d465. 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/QZHN31955277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0187075ec2f8a3926f568219b9ed35feebdb75dfcbb738b38a4e78328e5da5e7. 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/QZFZ31948321.
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