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 0xe83be84dda8b7c4b4481b66a9aa4e3ffdc8a56480fa7835cf60b369a0275b199. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81bf703f-94bf-48ed-94dd-730ca79ab9e1.json and https://artists.proofprofile.net/proofs/artist/81bf703f-94bf-48ed-94dd-730ca79ab9e1.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 0x45afd55567e1505f9c7f3d610f3763eba84ddf75e09298c7925c90e82b83d513. 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/DEBL60560380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295f49538485375c135da677f0724a1f254963391f7d88e41c6f4122d5f05f17. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEBL60560381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91256433077e4c1bc1669305997bea1715e2617f0e3b2005e1e5597c81a31438. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEBL60560382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98403fbc254d39814e196a1967e311e227b23df4ff053a81309fc0cdcfbfaeb6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEBL60560383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29378e0d5efab6cedcecab7741fa60b86d4983f05dcb7dbae3d8f2a6ef3104c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEBL60560385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab0d6cb53e6ab212b9380020086d40d0683c439ad8505782727ec5e00921554. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEBL60560387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d6803e093fa884897c00e946a12ba27332a70483e891f9d7813d968d4551b5. 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/DEBL60560389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefea16458bfe2e6bc53bb4587307720942020c405418fd5f39bbb02703baa020. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEBL60560376.
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 0xf6b21c2db1e42f499c4f5fce970aaf68e768cb9170d3fe044d117cd191968bd4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEBL60560377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e582056ea77f52f062b00643263000cae2f41fd413a3592200bcd5b299b0953. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEBL60560379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56583a7d281a15a5b69e79a383be88f39feb16d5d0a47b1b9fde10c87ad1e98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEBL60734895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b577291f92ff2df62f2595e25ee218bb1a60e3651eae613c08fd02cc446deb. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEBL60734901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312d46aa85e4a30b0822ae6dc9e038df4e5e4f258cc6f8a92686a775de10e10e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEBL60734902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4e2488391f015e4363e9988e7d5d841a3ac14f3c95fbb7c1c2448c38a71fa. 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/DEBL60726362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60859a8a20abff01bdae075a695f9410f08ccf108e5f45959a7e3a197e9bcd49. 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/DEBL60726370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb334ee8abe0e7cd00e63ddfe23b4646098256d38e1e77112eeba6710cc3bf0b5. 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/DEBL60702620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9b731ec779c625337edb229839d0d31b4f4d096c1ab01236ca4644b113102a. 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/DEBL60702621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4ec9c0ed7576e837f91f741ae7e9431ef1af041216389ebd7ce6e107253293. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEBL60702623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfcd8075b574c030cf04d6703b5f4df101c565f597c5a38ad501e6d8ed34a40. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEBL60702624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef03a4f42108492ee32213a7323685002caa1d1939fdd89d83bf0b79ac28203. 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/DEBL60702625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60d95b70167795c5fa5aff6b4ab3458d497003e40f834d31c327f9f0ce69250. 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/DEBL60702626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb73fd409c4aa117cf9681c0a079ad5108b99678975515d6a8e15a702f99b6. 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/DEBL60702628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b75ca2d1af56ac1ae640e3c6acc024d6e661bb76031eddd87dfd49029dcfb75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEBL60702629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12c321fd8b1d057f7c1ea9223812d5db244a6e0789e09f9b0582a64c30c8265. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEBL60702622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3f3d1be42586d5dc75e504ce81ec1855e386761fd300e6d455e8b1cc47fe6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEBL60702627.