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 0x629ddc8d5a97a3ab78f2f33685b08d775fac8371fac6affa249852c11b5aa800. 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/d8ed7022-3280-4218-98e5-1d4d90979843.json and https://artists.proofprofile.net/proofs/artist/d8ed7022-3280-4218-98e5-1d4d90979843.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 0xcc79319519571fb9868bcd9df3d918a26f7e163b7f6985b56e136fc662031e7d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:37:23Z), 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/FIGRS0800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd047b1779a9ea0e5fb1ff2129c5027da1ba80e92988c08bd6c6c5ec832e3d954. 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/FIMBP1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8910e49fe3191a8af665b3609595bec07714ed1d65862d78f3ec49120c2381. 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/FIMBP1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758ec90f710b1c08b93f89a2a741d57ba54c2f59e8b8ee2aaf05f0c989acff61. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIMBP1300005.
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 0x02c76329904b22a871a5f27fac1a5f51d669cb15398698d12a5a9cb5092a3604. 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/FI9TU1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa468a66847e200041d1a18875988a5df8d095ecb6730fb5e1c09ec867a226f0e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FI9TU1500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd36d7c66100f6e13a05e456332e8344a5c2c4ec45570ad72bbd2de5c8d82707. 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/FI9TU1500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770f12bbfa3e36e81ff4036544b06cb6aae701c99d873fd65946664bd3b2916a. 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/FI9TU1500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baa57560ba0855210ff1e0c99e6f642a0398cf0f5158e44f83e2dc49095da1e. 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/FI9TU1500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630cc9facef99c40e948caf42899ff7f1a575b93e74b70585467f0c0caa303e6. 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/FI9TU1500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e647d552c9235d09bdc76aacd94038f6541d3f14d2aa04f0709f0822f73fc7b. 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/FI9TU1500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fb2d0b22e02c792c3d8dfbf6b99b5013066850f8048f4a9b6c263dabcf8a62. 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/FI9TU1500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ab0a7d88577bde08d9f5d3aa6c8376a9ef9d1d8889f3ddbedd90bea606c47. 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/FI9TU1500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e60a72f7e481e3c02fb2b0243ec008e8effa5da10dcea3339a2e6267895da63. 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/FI9TU1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cc019a06baac51f1b86dd7a107add5c80074b4b8e6210b52885aef22405635. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FI9TU1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b6779723bd7acd41a3313cefa8d0e4df8e109581944066f5eba2ac50a3dae5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FI9TU1500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedc95c976ad65476d72e77403a9ddd57aec53b147136f747c912d7707004553. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:24:19Z), 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/FI9TU1600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3405ee421c247796fabfb08820b3cb88d329a7634231313b5e59ca2cdd819. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FIMBP2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7b6f8ce196667390a78e14faafba68af6461536f96bcb91e43e4df87073a47. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FIMRB2500002.