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 0xeaa4cf8800a1a6cb77545ed439a2f46a42ab713de993ed2d3cc66946a77ae990. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e16c8ea9-7908-41f0-a819-d53bc724abf1.json and https://artists.proofprofile.net/proofs/artist/e16c8ea9-7908-41f0-a819-d53bc724abf1.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 0x46fcd91f818c25d5ab64ef2c08cd53547d99a532a10fa2f54e5050e18127dbde. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:37:14Z), 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/SE5IB1900473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab63e20ef770e67a6fff3d722fcbc33f7094219689d9789fdf5fa1749a27c16f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:08:54Z), 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/NL8RL2507538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793382b7843168ccbf0ead7a2a1f309f333699c72f404cd667643779fe4d0f3d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/SE37J1503971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230513df2efc3b27466f6a38aa3e1e80a74247278eb18c2a4c1f7d65433d5340. 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/SE37J1503962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1261d4f46b33dcbd85498b21146b64d3e7c02cb97fada48c10b9cd12dfb00a22. 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/SE37J1504649.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793382b7843168ccbf0ead7a2a1f309f333699c72f404cd667643779fe4d0f3d. 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/SE37J1503971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230513df2efc3b27466f6a38aa3e1e80a74247278eb18c2a4c1f7d65433d5340. 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/SE37J1503962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1261d4f46b33dcbd85498b21146b64d3e7c02cb97fada48c10b9cd12dfb00a22. 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/SE37J1504649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793382b7843168ccbf0ead7a2a1f309f333699c72f404cd667643779fe4d0f3d. 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/SE37J1503971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1261d4f46b33dcbd85498b21146b64d3e7c02cb97fada48c10b9cd12dfb00a22. 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/SE37J1504649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793382b7843168ccbf0ead7a2a1f309f333699c72f404cd667643779fe4d0f3d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE37J1503971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230513df2efc3b27466f6a38aa3e1e80a74247278eb18c2a4c1f7d65433d5340. 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/SE37J1503962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1261d4f46b33dcbd85498b21146b64d3e7c02cb97fada48c10b9cd12dfb00a22. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE37J1504649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230513df2efc3b27466f6a38aa3e1e80a74247278eb18c2a4c1f7d65433d5340. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE37J1503962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793382b7843168ccbf0ead7a2a1f309f333699c72f404cd667643779fe4d0f3d. 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/SE37J1503971.