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 0xd31efcce9db6a8d91adc26778858285f705be894b354fb7dbabc4ab170ea7cfb. 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/000093d1-707d-4e2a-9765-7662dd3da45e.json and https://artists.proofprofile.net/proofs/artist/000093d1-707d-4e2a-9765-7662dd3da45e.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 0xae3c8693934136b14ecc7d8b40cc69b11cf43d6983c83f12980c66ff22ca3b21. 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/DEZC62155989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b213ce3850a33faa84f0e7a5b7e4a96d14d1f3e2f17d12b820660d2a0ec12. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEZC62128955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfc221004692dc3c488e5839b61b3fd0cddd9da214ea86647efc83d08b73fd4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEZC62145753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91f625b8dbd73149db7369cb9019930633b641f74834a261ff28d9d79b1f0a. 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/DEZC62252997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bc89ae9a793b8d8d597966e2192861f254b2e8b813e2e8df2202d6b7852b0. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZC62263173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c22adc8cb3a0d6211b7428d6a5a230b31ad02524009e90a7cbf21fc8abab06. 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/DEZC62289469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3f3955120650754360cabbb27996397d4b2a225a6ce4a4b935000db5686be4. 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/DEZC62202349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989ec03979554d247a0b17b5d4f5d6153f140956f340aec76a8377fe6e847776. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZC62326907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbaa4a4376835b2bce963625546d5368f265ebf5aa79b194bd7878d9ce30b75. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/DEZC62332363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d87453eb206daf42a24889760788aa6769ffcf7980d6e11dd49852da81561. 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/NLFL72300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5635e4a2da0f7ebda2a5d841fee1a5227279921588720bd0f446a17b44d67c86. 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/NLS202300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5cfabbc82413bc13e95c3630ca890bc993db8f9f66f002f1af4d5f99ebf306. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEZC62349153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba935e7afe126c2770c4c1d62664233c8aba104b4ddfb7f681908b6e65f243. 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/QZNWX2340318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a86a434cc9eecabd35d728da0deb8af0a9f26f9381539ff63b1fc599576a697. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLFL72300653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fe7b69f9426bb9c926cd2d4ba45d0f24f5274d1301c181b474be58d4c4ad3e. 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/NLFL72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200f23cf9cc23b425a7c7ce62f75ec200f6e1a4561b0a9f0c94e62f0e9d60c48. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZDA62413940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee1d5381d5911fe1dd91084d6fd1995b9386ec51194b2954d9fc3c71e6feeb2. 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/DEZC62414855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c25e1717a6f4e60b9d5c54f1d2d04374507c1a7ea06b1da53e62659bef0b61. 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/DEZC62442298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5635e4a2da0f7ebda2a5d841fee1a5227279921588720bd0f446a17b44d67c86. 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/NLS202300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271aa192e2186ea27582148daddceee3dd75e659775c9fbb2d35a78b3ecfd102. 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/QZFZ42417360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c8acc6e0d252443664cf1c06cade2aa25c55de5331c04430cbf2807cedc38d. 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/QZNWS2491785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5098076822fbc19bd8f079cd7281347b4855bd38c06b2ff349e23cc7dcd01. 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/ES64E2347342.