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 0x26cf299d6d8c71c93fc598dd51335e03a646e94ecbc003a4800249439872af84. 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/2412c32b-585a-456a-9ce2-1b76b1854ea5.json and https://artists.proofprofile.net/proofs/artist/2412c32b-585a-456a-9ce2-1b76b1854ea5.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 0x8e62fbee5e3096018c8189655be5c54e2698ef60acde47ebca040a22f4339895. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US3GD3563748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752238c6086c31443c1dd6b8b834cf5c02843f5da0ec8a1b5fbe7b9ee9f203b. 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/US3GD4196171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f4c704ecf36ea5a2bab07d21097b6c5eb34e804a4ea057e6cdc0c070d14e40. 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/US3GD4198021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78eff40c98ae81991a6aa6d9dce413006d02126f8d41da9db65fc5ec20547c0. 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/US3GD4511880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4201d2925487b2d17a5f441e4e8b4b8ad4f1e446ada20d7cabef166423e974. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/US3GD4514326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44933084467948325271701ecc9bc1c69fbfff254d2ccb6d161905a1f0ab836. 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/GBKQU2447296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58045456f806b0487b8d963f6d08bade52d4ebcabe8d8bbb27ffff3c7e0472cf. 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/US3GD4513269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c791e8ba1a489ab328319199d689f122d90714239e9e83cdbee02e994f5ab. 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/US3GD4514379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d6e4b8af9f3ccdcf4ef6cb170375ca15a5cbc20aaadd3a27286b3d3d410930. 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/US3GD4514380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d65f652e9d44106bee2d3385dc640794e7498f6d06894a3f73910a6a96a60. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/US3GD4514577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c5f87bb302dc91a0ab67325d49f43639993f1d6df986addd8591a9f953a33b. 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/US3GD4514775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e8c959c8b809ce946002acf8320194e763b6f1a4f6846942465932595c7277. 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/US3GD4514776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63288e51ddf469de9a861b8a65d4df751a164ba48359893b442d38973e929c9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US3GD4514777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430fd7aa83ee59a28701a74d8adc711d6b1783e8998947b20743e4d1d11dcb29. 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/US3GD4514778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84849758ca1ce1cbb8bf8bdb5363a1ea3e9597363f14c6c67d383211a78f4e99. 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/US3GD4514945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252465bf53cb1b2b95a31f80b364f6dd19da46eee05abd91a439258a493fa5c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3GD4514940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba9682e1373454de387848cf03bd90ee186050ec2e3c013347f9c6d5651a43. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/US3GD4515100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946f7839ce0fb25bafeb9db657fb5718c608324247422ea96b31cf2880655ada. 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/US3GD4515075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd3f5ab5f28d21a5138213c9a8c2a995dc0395fa5c91c74e1305eca1429df7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US3GD4515102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4500ebba52956b005da143ad3c05c5afdd8820da07a577347e67f51d2499ee68. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/US3GD4515106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1995670a8f0a4b1e2edebbc4c40405d3645bfba801cac7c64fb16cc4925f30. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US3GD4515108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b960b54031df9475d49c18a84894948e5931c8f9f21368b3f322a2e772ba813. 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/US3GD4515123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdae162f14d8175817edd812b25395ab095ffd4899070970a3544c9a426d7ad. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US3GD4515212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99469a9e896c0ce26d193bae81a5c920520c1e5bfc69f254ecd22da049ce6e8a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US3GD4515618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150722eda77898722306919b94d27a8b660991e323041de2b0ecddda90bdc8b3. 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/US3GD4515675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff38468a44299a7b45a3b4e869432e4059714cfc4913b88ed08c8e46ca7fff. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZZ8A2579801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7186f0b064fe54c95310d6e88d8a7d617dc3d242767f48d5072ce81dddc9afd7. 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/US3GD4508435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca009ca89a101642590b1f7966013c3cc45bcb7d64eda0172cecdd3c28a1fa1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US3GD4508436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f5acd77959ee3bb27d2481f881beedd0f17758d7b5f045296a741bdd1036de. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US3GD4508442.