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 0x32d8883ded51829205a7b08e6862af1370a337395bd04424209c70804a7fd4a2. 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/eedc4ff7-e92e-48b5-8ad5-62891a58c01e.json and https://artists.proofprofile.net/proofs/artist/eedc4ff7-e92e-48b5-8ad5-62891a58c01e.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 0x37b3bd4a66b45926c2d727e6f9f0d17a9ae674e1957450dddd1f53191076f3d0. 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/QZHZ52137282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde61253fed480c435b9e7f59736e10f7f4ef3e472d9effa4168d6859cda9d759. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:05:12Z), 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/CA6D21800284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b864a3f506c6854dad68e202adfdc516d235f254a0bfaa7ba57963d241bf3. 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/CA6D21600282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa956b63277a95ef73776ab9fbe0732eeabc36471b73a9be1857242dae76eeb16. 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/QZ5FN2046471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cb06d3edb9e28fd6126fa8411d65d7b4ad48652c3d3e6b45848342f7d10a09. 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/USA2P2141630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4194dd964cec0c7cc68a4d1c8a54fb1f302160de0b83b989665a13cd011879c8. 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/CA6D22000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61b4ecae7b7f2d90c502b8d64a26b98e4cf4bc8985c79e4fb4e21e10dca18b7. 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/USAT21701633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde61253fed480c435b9e7f59736e10f7f4ef3e472d9effa4168d6859cda9d759. 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/CA6D21800284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62745c4dfa92398061ab4d7b9c0cf5e2f644a4a721ba4c668eb2b34e59b69b71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:26:12Z), 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/GBKPL2149055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62745c4dfa92398061ab4d7b9c0cf5e2f644a4a721ba4c668eb2b34e59b69b71. 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/GBKPL2149055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09c2bd64f2250d90cbb43e7bd8be741215850ff433a6e12de77e3a11dab777. 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/QZFPL1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4194dd964cec0c7cc68a4d1c8a54fb1f302160de0b83b989665a13cd011879c8. 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/CA6D22000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fb2c7f0cec483a492953118d7bd9920506f3193633dc2a3c0bb5cb52fa4cb7. 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/TCAEF1949800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0299fdb71159a066ff6c80293179b7e717fe05b3178734881a743376c77462d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:46:45Z), 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/CA6D21800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0299fdb71159a066ff6c80293179b7e717fe05b3178734881a743376c77462d. 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/CA6D21800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12abac915ddef5ea198ef2dec76f5b2d41b57c9a92a120d5a81c2d35809fc83e. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USUS11700101.
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 0x83a4c37767654fb5b3139b6e1c69d8314e1a84737f9c369d9d90a622ef2042b6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CA6D22000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fc3afcf32515485ad388512c36dd36703da2bc7894afa16c4011820ca424c. 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/NLF711703312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba19880938d94870fb237d94b309cb0fd26101cbe8fd989307f8a238d91bb74. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CA6D22000329.