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 0xc69d49e354307abd872be38458728e47c8afedb7263324988a3d61c7a5ad2361. 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/6fff9523-400e-4456-97c1-c56c9e799bf9.json and https://artists.proofprofile.net/proofs/artist/6fff9523-400e-4456-97c1-c56c9e799bf9.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 0x290455ea2123a4efcea88aa2dd427c33e86c5512b1691057a087e1ff5b0da829. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITS781700779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9b8414964a9cd77e91d61078b32264d9bd85208cb98f5fdce65fbe1d1812f7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ITS781700780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe623f5631b6c7d8ca6dac08f506b65d82bc04745486365f48d8292d2141aa2fd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITS781901341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabe76880fa2afc466e6f93a5a2ba35f79d739e53972b77db5ba945994d0787. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITS781701459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b0421fe924d5c954bb0c6755bef1cc51da9916d6750c872b2222a90870b40b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ITS781901301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96958ad890c58794e02fafafb6b41a08173a8c446f79c5029341b30a941c17b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITS782100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7dbecc97ea35631b11eda030c57acd97d6a1cb7347aa5e3de1bcd899d59bc0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:42:27Z), 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/ITS782200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde5da48445a2c0dc9462f75f8505939adf2976106797f546932d2947fb883c6. 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/ITS782300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06969d18c5a40cb8978839abd4f0ca26c6a5ee341c7df334b3f6bc0ae7f5ef31. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITS782400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b428597ec1a8590c70d8bc57bd197fd80aea2fe9c57f77876acc8196bf50b5. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:59:37Z), 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/ITS782400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cbf9cad2ba09db99766ca64f1aa081bb1ad2a1a98820bab94667dc0662c0d4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:13Z), 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/ITS782501172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b0421fe924d5c954bb0c6755bef1cc51da9916d6750c872b2222a90870b40b. 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/ITS781901301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f52231360ce6c4c6857394b791eb1bf537bfd49ab74c4ef4f1b5df629e89f8. 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/ITS781901153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3399b065b177e099a736a9c88f119ec89526913960a4122ae823c3b3ec554052. 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/ITS781901291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3399b065b177e099a736a9c88f119ec89526913960a4122ae823c3b3ec554052. 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/ITS781901291.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b93ca1c5f1f77863d058b9611af549cc768060bdce30a4c72005ca0b2687be8. 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/ITS781700327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96958ad890c58794e02fafafb6b41a08173a8c446f79c5029341b30a941c17b. 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/ITS782100013.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfe5504171aa09e281dc09dc7fd42a5fb67deecc26a6819efa0abb198625a86. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/ITS781800108.
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