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 0x91341f1cf22b0ff4986f04de85cd2a7a457c5c7dc2003508e7f6ba22bdab7e4c. 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/fc4355a5-1000-43df-8052-fd47fb178146.json and https://artists.proofprofile.net/proofs/artist/fc4355a5-1000-43df-8052-fd47fb178146.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 0x7c68c5ee744b0776650a784a8990026fe86fec9b9926ef9ef7d7c987310e1b38. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRUM71701913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef714aac213ffd7cee6d7b8e0f9768ebd12e862dcc601ea25d4d595cf5d5fee1. 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/FRUM71701912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5f7678a3c5e04d3b536a9e0acc2abe064f74236b8b2d7473abacb7832ae01b. 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/FRUM71702068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9070c6245ea0fc5c25a28b158009ef5df7257158d61235345eb4cf2031e77e27. 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/FRUM71801559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb83c5c5f74725d89745a05c442afd875861e2420ea6d03948b8361fffec423. 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/FRUM71801564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0aa380c83edf0622a6b7170c0960749de7202e4ea9cc4613eb53dc26666c4d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FRUM71801051.
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 0xd5abf3280d7e63667285393b5a994f21ce011fa437495f5fcb37b023b819cdda. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRUM71801557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421889c980da05ee5e9b85d656edce1d86b12200a033fd3a50de4a0e5ff4e416. 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/FRUM71801560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6368e5f36c7f3b4de753c5436e7c7a240aa4aa3c0fb11cbca568f362692566b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FRUM71801561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11020cdde91642335ffb3289183432af99d1edcb933c2f45428ec5d0a27ed88. 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/FR26V1541040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7e3b503cbdd6c8dfda24cc29737fdaad88b89d195fc700ef9856ccc46d7e8e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR26V1541043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bd10315a3420c58d08769d751fba5439d604e474107fa53d1970895a9cea78. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR26V1541044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbdf85f94711dac465be3f831ea3dc8ae347eeb8a90a105b21d2462c56c8459. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR26V1541041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab922310ed3e6c9bbcaf8ce3ace77b07d2264fd36d2df57b7d393092e88934af. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR26V1541042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f79914b60dc7a2a5f6663495b29e04a2a3e2848f4c09880686f97ad162506a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:20:05Z), 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/FRZQE2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24983e7792fce51406748e797a959f9d24e56ecaca55e992d2cf83696be87e8a. 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/FRUM72000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855557d8648a8a41a63eb720cb876abf175f4408c39bf387eb36ca25ec033217. 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/FRUM72000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27dcc00318d7d9339816d1aa02db9383f16fdfd2c6ff55391f4cce762c8e06. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRUM72000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0a10592a6d0bac45679bd9130d27daef4deab1e91b8e186711d90d4507716. 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/UK98Q1500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3be9b962237cf49b60e20ac995cff33e260f56f84c9f6d81c65b00a7d25b742. 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/FR5Z21300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9327ac6d6e3d047cce4158d304e3fca72d3476303b750889667b5c2ecfd105. 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/FR9W11402317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa7bd158bdca9871f192887a047f06ef75b1f5282b807062c5d1912cb6258a. 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/FR6V82171286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab8c7e867ec3cf0b3bf5597c817def75d8e150aa1eaa2c3636533db84f833b6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FR26V1407226.