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 0x701cd455fcb0f7b0c1a76319bd70f66e2356adb1b9f85732fa52150cb296efc9. 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/7db0bd9d-fe48-4577-bad9-f6aab43f8e0a.json and https://artists.proofprofile.net/proofs/artist/7db0bd9d-fe48-4577-bad9-f6aab43f8e0a.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 0xc65b0227b33a3bb63e9f06727ea178dc9fee7cc939c05e741a37d5a5320345f0. 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/GBSMU7102043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf0079820fdb91303c72040295da4c34851de3309d2b6310381fd35cb7e4186. 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/FR9W12104019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a257a28be88bf2846d40bb5414063c72d0c08f7a345d2789aac49a58ff97d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR9W12113993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47398c353ec7af064cd27459ec6e08e140aa200ea110e37ce61490bccb2535. 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/FR9W12113997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd80f0b846e055ce62a1f9a618edaa2cc79b04dcf497fb0991fb06f1dd444c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR9W12113998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bee0e8c75b431f82afb189963cc7f72522bc750d465b43ad55713f58d927c2. 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/FR9W12113999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a5789cc61292d9081268f5f772f0cf2643d45a51791fcf78124f63fb22e0ca. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/FR9W12134260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5cdd1769ee108465bd10b1d6546d6c83cbbd648e0e452d0c2c0e515d6d657e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR9W12134263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a27c903b91df21dcc8d3f4febd521965cfbb55d4cb7aa3bfa10d88a76807d2b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR9W12145934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a594ccf774fcbd2c383770a1c61baf5f4a710a44d260200d572ef376c34007. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR9W12148302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51d4252b681e738463abdc242741cf98360c7f6aefc6ef358d798b5e568e750. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR9W12148303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9facfc981fc69590d77ca8de5bc4c3793a16f16eb0a4ae7bfe2c687050122d5f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FR9W12148307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4391b9d35215cda26092de3c28a376aaf16fffdc21b751a051d7c283933493. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR9W12309231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4e67668749c79f5abf50f98ba5a0d1556b502b759fe34c2e9ebf16ae6f65b7. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/FR9W12320357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed7af1a1bfec2ff4b1561d0a14d504eec2cca363f544c727961052705ae6300. 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/QZDA42427429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe825572dbeaf4e1d644d15df31ee6360e45260a6e779993a4753c335977496d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZES72435029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c3de8d03f346db02a3ae77265e31c301a7d90eb3f35e66ebb5866d51ef4438. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZNWX2467477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c41719492fbde6a5bb5436ab5a6435eb3ecaa97e8b3b92ec53cb4c7a2d7324f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWX2467478.