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 0xbf7a8855be23a6468fdd2ffb713d856873a2d3400fca35db1b003eb481a5875f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/182f0ec8-2954-4bd0-8ce7-93dda6cd9a64.json and https://artists.proofprofile.net/proofs/artist/182f0ec8-2954-4bd0-8ce7-93dda6cd9a64.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 0xcbdd948f8d40fb0c636b51544bfe4d6672a2fe4b4465e6568947bc4a00e5e2e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5IB2296960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5626ad12fbe876d28320e32627e3b532c1a807a952528c6503c0afb1d873. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SE37J1504254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7d4bd03bc6ec975f0f109dc93468e6b5fc4f336826e54374e22d3d3eb1604. 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/SE37J1503964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02e74bada6fa66106ad06343f8ca9c5385ab4f9c697451af5eed5e4072b371. 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/SE37J1504165.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5626ad12fbe876d28320e32627e3b532c1a807a952528c6503c0afb1d873. 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/SE37J1504254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7d4bd03bc6ec975f0f109dc93468e6b5fc4f336826e54374e22d3d3eb1604. 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/SE37J1503964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02e74bada6fa66106ad06343f8ca9c5385ab4f9c697451af5eed5e4072b371. 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/SE37J1504165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5626ad12fbe876d28320e32627e3b532c1a807a952528c6503c0afb1d873. 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/SE37J1504254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02e74bada6fa66106ad06343f8ca9c5385ab4f9c697451af5eed5e4072b371. 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/SE37J1504165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5626ad12fbe876d28320e32627e3b532c1a807a952528c6503c0afb1d873. 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/SE37J1504254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7d4bd03bc6ec975f0f109dc93468e6b5fc4f336826e54374e22d3d3eb1604. 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/SE37J1503964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5626ad12fbe876d28320e32627e3b532c1a807a952528c6503c0afb1d873. 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/SE37J1504254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7d4bd03bc6ec975f0f109dc93468e6b5fc4f336826e54374e22d3d3eb1604. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE37J1503964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7d4bd03bc6ec975f0f109dc93468e6b5fc4f336826e54374e22d3d3eb1604. 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/SE37J1503964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02e74bada6fa66106ad06343f8ca9c5385ab4f9c697451af5eed5e4072b371. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SE37J1504165.