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 0xc8a6aae439e5ec3803c72f03c49347d0faed619a3034162a547ea0c9f1536060. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e70c8f5f-8ff3-4fea-bde2-5c2b9202d7d6.json and https://artists.proofprofile.net/proofs/artist/e70c8f5f-8ff3-4fea-bde2-5c2b9202d7d6.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 0x9f2d4d6870becfc4cc0b0af79d3e18ceb54ee5d1d746c4d777ada0b7a43a0990. 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/QMBZ92093896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54fa260a05c505410d32be2a2a0bad82ea60f0b27efc7a0148ff0a11eec104e. 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/QMBZ92083770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4613b82541afc23749a0b77563f6f080a4452409548220575ecd1a2dd3b73b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QMBZ92093898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f76290aa9309c26fb9a0658c3927e0d4073a95d62084e2f1a0a4cfb475a6fbe. 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/QMBZ92093900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2320e872b39548c5666de7e065be1ae96b2c10d57b4f50ac26304002272cac. 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/QMBZ92093901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5fa7a01d326b493ec86af5b9c307f6b0b7a4a60ad05a939c825e75f42ed3a. 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/QM6P42052773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053bd742e1739f30eacdde2a88f08fe33500feff821740a59e6ddae5abc490d. 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/QMBZ92093903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e69469e7ac3c81f3b011abfa5a31a987a7b8fdb0318e3865898f9a5e094e2d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMBZ92093904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf9c3018ca33eb35e7b1a7eb0cf0ff8e80fb3351006170c2a17af1ffc2e539a. 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/GBMA21999604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eb3306b6ee9f7579d79b16879c22ce2210b732c65b3e977e776946f242686a. 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/GBMA21999607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25394bf90487b01fece867b53b39961221b4b7ef9e196bc45480acea04b1c8. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBMA21999592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894492d94fa905bbafb6e6ff15b36b8f0dfc39466d6a9d91acff834c0857384. 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/GBMA21999611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1513caa68a0d7c2b8ddd913bf00928099f1e6adf92aff5ff4d41b8a0c4326c. 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/QZMER2215941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5f64efa7eb84e6046229f0b31a659b4fca8d156112a01ce14ff1ffbc5700c. 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/QZDA82280535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb631e7ef7fba8f53a4870786812e5975e87b33497662f76b88ce156eb0d60a3. 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/QZMER2215942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20b18c44fe10b02b1f67e8d0983dc5ecd5da8b337b6ceb0a8f8677f738d1b9. 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/QZK6L2274002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aed54b9376de7c23ec81b9bdf44a82a9536bcdfe5879573e203aacb19af9c1. 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/QZMER2215943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20b18c44fe10b02b1f67e8d0983dc5ecd5da8b337b6ceb0a8f8677f738d1b9. 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/QZK6L2274002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5f64efa7eb84e6046229f0b31a659b4fca8d156112a01ce14ff1ffbc5700c. 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/QZDA82280535.