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 0x0a0254af83aec3be2a3253d2e6342d3db52fc474d3a96454fb1ba905e2b796a4. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5da8272f-26fa-43a5-9447-5d782122a8cd.json and https://artists.proofprofile.net/proofs/artist/5da8272f-26fa-43a5-9447-5d782122a8cd.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 0xa0ac535d3b9658614a1ff59d59d90f6fb2d4cfb00139c7b5cd343ac7c65ec8a0. 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/FIBAR1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bc54802e4f0c13085669dd2099379ebb4cad561d1a9f650ecc773071b742b2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FIBAR1800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda78decb6dd162b38bc348dd66dae770f7503af07f7846437d72bddf8e97e986. 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/FIBAR1800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697f8760b02ec6381d8dc3dc03100ae3dce2b7b90888f7e73dbf9fb4319dc392. 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/FIBAR1800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb454cff123c1bf15805f6b5b382f8c10b73c92f05ba4ecb753ff38468dec1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FIBAR1800056.
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 0x805b06021a9fd4c7bb3f74f8f315f64a3a19def185ea87a7c5090e39978c0eb4. 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/FIBAR1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3060dc29ec2f1cab7abf07459572c01ce6490fa988359e9a24e07e3b4e826812. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIBAR1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c84c848a4e576f7f69138cdcbe38a34f0d54b73886a0eb08bf789164143a6f0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FIBAR1800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90be2d667f79d7517b32bdc90ce7fecfc3e6925161aa6693ac2c9864b25e6d8. 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/FIBAR1800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8698ae13831297e350c697dde04cd3e22a7988edec6f783fe9d6c78f37f6988d. 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/FIBAR1800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334205cf6a4417b2de78bab48aac2b36c8dc8c04fb53792351d2f2d1b960f409. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FIBAR1800065.
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 0x20e4c985f22af4e3d5da71b69f4488bdda092196777ac98901dd793aa0ca5190. 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/FIRMX1300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57e7a6a7128957981fab291788b771491c8e4debf880bfa19973a999b4c64d3. 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/FIRMX1300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506d1a8841fd63b72a309a7936973dc658cf93621781c494a2695fce4e93e56d. 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/FIRMX1300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb675ce223e7f80940e93f1b315984cb229189a3b7025e6e5cab4e56fd1ee6a. 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/FIRMX1300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c222925836414e492d4aea2ea52b2d4f76711e42af395687b63fd4899d3424. 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/FIRMX1300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0402d9360979de1291b7477eedf9dc6b476f66e9ad5f22c9ba042aa9f9235970. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FIRMX1300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6e87c0dddc79349609aa5ceb9ddc7d0943e98b73769f1c9037773f042fd9be. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FIRMX1300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4648b55e800cf6f12de3b00d240aa9bceed13e48cba6137fc70c3082ca7d4d6e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FIRMX1300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357f00ddacd85bf1c206049fe6856f1d27d8bf2bd2b147861baa6872931d9971. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FIRMX1300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d5056325746456debcc384e4dd8aed79acf28db4a3891436b5b4ccb073c01. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FIRMX1300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b6df3e8e4baf92bbc75f3c7e204694b110322aacc3a806d5c9c78ab579b70a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FIRMX1300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbb3553c3329964b883a333da1cf776704e069c7cce1ef2f57967bcf2749bbf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FIRMX1300073.
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.