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 0xca97f138b108d25fc4bbb0a156f7d2c8173bb08afadce404da2d79a2bf5dc458. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e572cd12-9531-426e-ab91-e0a21f08da7c.json and https://artists.proofprofile.net/proofs/artist/e572cd12-9531-426e-ab91-e0a21f08da7c.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 0x4345dbac6fd9c4a6e04d30ad791a05b42c2a64e76c980df602adab831dc93007. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2139288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f6106bc0f5ca3f8d7d9a341dfd6c60511e1d3896d8ac89170f87aea9d4af62. 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/FR59R2538599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6d6ce2ebbfceb00e198f6dd2638ac603c1491fdc348f69e0cd837a3c85234a. 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/FR59R2538600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b93d70dfee55c01f6c1f04c7defe50af5949c2df372a3e9b5ee2d2f3e3d918. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA092368755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716393fee50321efb8978bcbe6dd36959129b6447811e9cb2ac71efa06077b1. 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/FRX872169127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7aab1f639cfc7e2e85b7806179ae29d94a3bf4504ad3ceabdc7dc74d0a0f3. 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/FRX872169131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa718bf47ebc9f72e78b1d6ad0970e5660ff56622b789f9437cdecbf09e2a86fc. 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/DGA0H2325687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b93d70dfee55c01f6c1f04c7defe50af5949c2df372a3e9b5ee2d2f3e3d918. 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/DGA092368755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a021c3981e9042c93844d18de91f0af5140f8baa8b94952962b89eb9a09d7c. 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/DGA0M2361142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c41ade1839fe30325134ff70f0ffd1905c3a819cc54202c42ca02cfc803e4. 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/DGA0L2345686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6107d623c906b07293c550e5bb98eb0ada084ed2da6172aa99e3ec399f6c3ce7. 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/DGA0L2345687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd628d11f796a92f456ad2a6a779610212e31655d29d82c0d1093a0d5acad1f03. 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/GBKQU2113710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf1fae01d9812f018d83493cda05397dde09d429ea5840216b034d658504caf. 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/GBKQU2147739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9caa32c3d5aaa97d09a2efb38c18dd07463122eb58cd173e96eb6970c9a98. 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/FR59R1878012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd628d11f796a92f456ad2a6a779610212e31655d29d82c0d1093a0d5acad1f03. 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/GBKQU2113710.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bd25f8fb79e6b3f188b4dfe6ba4115dd4d90a52e2b4205c6e0f847fb081781. 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/USA2P2145633.