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 0x0b12eaadbdb926a4d523e9dbc786a7bd4e23f8ebcb1d6b97a16d71b099c37e7b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca90f35-63f0-4a29-bf52-dc7a9aa5d0c2.json and https://artists.proofprofile.net/proofs/artist/2ca90f35-63f0-4a29-bf52-dc7a9aa5d0c2.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 0x99ebb23f7bb799f9ac5d33a6e60b0ff2302e8592420f16b8399958f91c4e3750. 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/USA560515070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514196da945796fe87e9dc95d26b4309ed9d345a26a55e5955f09c4aef701e4b. 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/USA560515071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042fd58fbfdb4ed26ae6f043ee8f0ba028499ad2ea37ef0bdbbb6ec0b218e20d. 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/USA560592344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f098cc59a74e43a4705a2eccb611959e7781fa4f67ae5b162bc2f6bc0fa646. 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/USA560592355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb699c17a0d2b95093e9dbe1b90b31787afd28bfe6fd76315ceb32289d874a4d3. 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/USP4A0606002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fefe5e3cfc3b1de0c365200a80d783a3d4f01c9edc52954e3966c7145bb614. 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/USP4A0606012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e01986fefd102a93d78d1b2c788da96cea3fb0cc923226ad1a42bcb499af83. 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/USP4A0606001.
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 0x39b039aacc344b267c57b7fd94ee7a88940862dd22d714f5091c68579ea9c50e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:29Z), 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/USMTG1306201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5396386e5bcf2afe308ea19999f67c0855aa1e51865831010e84d1e1031d8f82. 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/USMTG1306203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1fc2c88906bef084cf079cef3afe160063a5d57dbd5b1b9fffbe30961a358a. 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/USMTG1306205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69c0e5e6d6ef167f13df02f8d5c1d82c6ae16007ae4a3ab9505d3bec4c2f7b2. 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/USMTG1306206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3b94cb768db6e24f6357f5aca5b6b442e8643822a88e7719b3b6092d27301b. 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/USMTG1306207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838762227105cdf38de209947484890abbee8dbfe36f706570d8198594f78349. 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/USMTG1306212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d8bd8bd86a25a12ae0910a26a1becae0622ac3d07656aa8ab2bd515ff214ee. 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/USMTG1306202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3f45c00d7c40485510c40136dced17686a1addd93c9a3cae599eba6cc67ce2. 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/USMTG1306204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc472a53e3bb98cac8a1d62066ff86e9125b5e198632a59852ce3e629497f3a71. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USMTG1306210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6fae8c0fdfdf00f3a6e02c9f12787d2692e234fa7ed43698cad47c231c5e1d. 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/QM9AA1620274.
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