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 0x872089206dd695afbae366a6c57f573937fe5161b486f15208134f90810e9477. 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/97b22130-345a-463b-ad25-e88deb0eba60.json and https://artists.proofprofile.net/proofs/artist/97b22130-345a-463b-ad25-e88deb0eba60.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 0x034990af45470dababe52b0bccf8fca5e1e7709c7eb3304e850927649bcbe780. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DELJ81626683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ffc9fe40bf4e77323c8723066d0af062a4632a8a3202a9282b04013a24e462. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DELJ81626685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfdc3a0d593298c40ffaf9d86e65231b9897e8378db5a0f318a2745ef9f9ae6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DELJ81626686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f633a71e3ef29a9f806738a86c88a75af515d15540a1be373998e2b1a57079. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DELJ81626688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58504121a494d5807b52c36ebdafd93c41fd4a732e5cfeeeb5ea6ea966bf29. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/DELJ81626690.
Here We Go, Gettin‘ Smooth To The Groove
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10992b010538b746d6e56c00442997582ee8189d225a0d17599219e50423202d. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DELJ81893361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93842c3a84add1fd3c1d9a13a45589a4dfb1f92a197232aad2fa4c0240487e14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DELJ81893363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0277ccb7c7bc17edc545a90564cc214347ae6c3b858d9c5e6e087dd75088fdc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DELJ81893364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a06e1ff6d275950c3b54dce6e3bc45adbb18604e69447261d6f0312c89dd9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DELJ81893366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cdb188eabdc3a10177eb647ae837b12aefb33c634df1acf522bb8347974fc3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DELJ81893367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045cfe897dde67aeab7c3d9ba1d4b1c9fc9e48f8d1fcaeed00f79972bbed42b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DELJ81893368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d9a04463518804c0da95a6998f342e1dff60c9945570388fa24419eabca4ba. 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/DELJ81893370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557ee3c3d486db1b3c7c654afb2ac67dbbcff6358fdb195e288bbd4e740f6478. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/DEZC62323946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5219cf2b852d00f4d31d76d41e913fecafe9cd83ff9b4b49245008e641de93. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEZC62408858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d0b606c41d7bdf81571a1834a21b444673deb01a7d610c9e0ddeafd2c5883. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEZC62441449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb770681f3efc9c5cba393e54f4450f6e91cbda292ae402198de3520c679bb0da. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62520035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6055377f8f9d7a4d33a633ffeb9f3b7e498b70adaa30bf3401bd36cc879871. 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/SEYOK2031139.