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 0x4a83defed13adc8051a3e2c6f2fb8cf5f44cda635543cd702055cff6b05eccb9. 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/3c9d56c0-be93-42cf-8e76-854ebb8696c4.json and https://artists.proofprofile.net/proofs/artist/3c9d56c0-be93-42cf-8e76-854ebb8696c4.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 0xc7a53dbb53c333c4098e4bf1964c9a98d2add00131e396708b4ce991189f2c24. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZDA72090623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f6e9d25be7b61fc71d6d3e5cc60192d3ecd62bfc02c3001c5e08be768a9b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN41992992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446773f7d70a0108a28b758a7b3bd8d2568aac5e2861237c13c2fee2787a716c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM82134524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe500c77a02bb7460df3b39ed7a227acf3572985325e175d847fa462ac80b68ec. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FRIDO2211085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fbb9e6514d850b673c2b15bf9ad12bb5ac6113704d0688f60261f3d9efb2f1. 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/FRIDO2211266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf427bca976fce44e729de196c9942d72a7d2357c84b9c4c658ea7b43a1c1d6ef. 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/FRIDO2312287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c9f31c1df095e48870f4175cbe316d813ae7f8af42d5c214cd99c20bb0e0e6. 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/FRIDO2312917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59565fdfdc1eba88cc3222ac41ebadcda52fdc285a88d58a8d2fcfcd8fd5af. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRIDO2312841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf427bca976fce44e729de196c9942d72a7d2357c84b9c4c658ea7b43a1c1d6ef. 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/FRIDO2312287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e7df43ecb68a54d950b196b34fd08261a264db7c852c87f68f8f0bd7531ce. 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/FRIDO2312918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b962f4075546802ad4a2daa5edc6f0dbaa7d5e3e064cb2da20d86a4caf924a. 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/FRIDO2312919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774b0f735b5e7549f1737a4a70d10933c0e69875f267221dbc464164bb170548. 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/FRIDO2312907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda05d359ca659e645509b5f535c99e4144473658224c619bca531614967bbac. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRIDO2312920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ba28d26187c49ce7729afa23e05f05c42704d81bbb7a3cdcf330f7cedb4b53. 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/FRIDO2312921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056f94198627ebdad316168fad1a6fe86198bddfa8df3858ffa2a92aaac5752. 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/FRIDO2416526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774b0f735b5e7549f1737a4a70d10933c0e69875f267221dbc464164bb170548. 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/FRIDO2312907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec06469020a3dce864705ca0d807a559a078c5f0cecfde6a53e684e2e93df631. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCJY2200013.
Life's a Bitch, I Just Need an Early Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395716315e7c743d89a123e262189442cd914c7ee5b076c6a0d071ac195af250. 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/QZAKB1910274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa254a8d3f350e4d277129a023d0dc022eb7e5e65760587dfbde8965b91c549cf. 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/QZAKB1910275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb7f9d13e00596359e9ac2841e615fb83983c6c2c8b56e4b56a161c87390141. 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/FRIDO2111007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9120c62843341024a0d38fde925c56f03c9104099265df95e63a6adcce0f49a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZAKB2002123.