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 0x5f8f46cf59b3035700443808b2ba1069f7fee12fd785fc301ea2b6dc88e37820. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d578bb68-0e04-4f16-8378-c348b078928a.json and https://artists.proofprofile.net/proofs/artist/d578bb68-0e04-4f16-8378-c348b078928a.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 0x6159c3894effa42f4adc7e2bdfede22c503930fae5296cd3737a556d10867f12. 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/GB8NS1801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7377a40d520560693d93101072443ef87f4fcbb1928d9d7de56e8f628ec7a964. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/SE6JD2300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b672e16fd7e809478e2af9b2917395dcac2a548137902ce6b2392ae9429b3. 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/SE6JD2300550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c81af9d88d95fce4c9d0419d4f2255c6cd1b3489979daefc2d0cb8367c4479. 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/SE6JD2300557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4f245933fef627dd97d93eaf0059c782e48f4e5a0f78b8a3b3ebd1ed21e54e. 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/SE6JD2301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c8b907f9da93fe0dc1e092d6caf02bb542adc6981f99ed4d630e43ca072de. 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/SE6JD2301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4229e3363d146113b9464f521cc6ba9cfce7c1f8920102f784c8b83cd7998c. 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/SE6JD2301112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253c042fc2512cce464f581176d98041272532ea5efb86288617a057776ebf82. 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/SE6JD2301117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51aebc8badbcfd0cf8f0105fa2b054d0d49f3cee3e0460eadf78f77b46be54e. 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/SE6JD2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7935c218ed7277a6ca6dd7564d1ef77f59465c2c3341845927ad2ea47e9a01. 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/GBAXQ1027205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf470fbd0739ae5a66241993996f40f4e2de9bf58be89f3fd2e47b03b3e8db61c. 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/GBAZB1709002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf792063c7891398d88a0bc64f61f4db843d80981431365d86470ae85c4a7abe8. 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/GBAXQ1229801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ccd635b6d68f2b4d97e0745e1b39d2855e23a7c055dc2105a9db4ad7d3afa0. 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/FR8E41300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186d528b55607f93d2df4426acb9cc6bbb4a12da290a1f33670c6f12957f0aaf. 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/GB8N61601016.
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 0x5e2b7c609afc6251d2c5c90863616272d6d029a9dd7f0cbbe0b5807b029d3ae5. 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/GB8N61601003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa195bad8b7581358ae3cbf4fe0c44bc87947593d08ce2004d813bfa5f8ab5321. 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/GB8N61601005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0f6d01b1aa0b2cfc9fe5505eb8158c6e634b1e3ab842b759406e33933b741b. 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/GB8N61601012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2c7a14a871df51b3badc97aa23d7757fe5bfb8997055d36c7418c283127990. 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/GB8N61601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46adf545f119f7eef63122f73b5ced4776b14742822c0f73f0492931f9ba621. 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/SE6JD2400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa546833c6f58585f2b8125c219d3921c983e4a135bd9b70899fe72a0dcb8fe. 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/SE6JD2400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc743aa18b1dc34a0c634cb7e8c01115f5afc7f937625d9af13f32bb6a2c53813. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE6JD2400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba2d961dd28901245375037fc23c234f7c196a0c54f2b92db6c8599e616977. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6JD2100824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc441d815b9a5b9be319f638c4fcf50914f4416ecfcfa2f783a8ef440e1a26d03. 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/SE6JD2100799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7dc276b31a0a0de13e253ca2f39a77d75b72b3473a130960c4919530f8346e. 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/GB8NS1802004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccca9229d33d67da8f4e60231103f26790865dc8b7dfeceb74c3d57bfb5759a9. 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/SE6JD2301266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00da3518dfa28fd2be07b9c8ef1095d5cc0dc21b12154e991d892190587ad16f. 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/USA2P2355724.
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