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 0x83ccc1991bab3fe249fdb6ed4d8aabd6f96c96bb190f41053dee02dd684aab9f. 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/8383d9ba-aa5f-45ec-acd4-8de661513b52.json and https://artists.proofprofile.net/proofs/artist/8383d9ba-aa5f-45ec-acd4-8de661513b52.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 0xee4d2b5e304ba4e487cbe5c5268043dbc16d5acce12c2447100fd094582e2f6e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBLV62409025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99365cdbdf576c09c4cf8a1ff6a168820b3d91a8d56a83b31bc2140fe6cf3219. 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/DGA0S2409724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a470f07cdc80a82b1ca23e067132c3d794767940ac22924b4fb1936995330. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DGA0S2409725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175879ef96d16d57025d3f095ec04f7e30249333afd1e109cf3d5d0ca9f22cbd. 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/QZZEB2440044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3df0bafa1bdb9e40c332d58ac9cc820a2c997f0a72fc2b6dfccbd723cb4cd17. 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/QZZEB2440047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1576654dd38d29ecef3c0a2221116f1b38fb9769be7c6212db78fe8408374e. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZZEB2440048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8e35cee965c1330abf026d64891230356b31dd2ec70f3173b319a0f7ed643. 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/AUGBT2495910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec645c4ffd1975e32a57f779dfed2951b40294dbcb98dd251469c91a7d68b9ab. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM4TW2516454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8872d7dbc64e6ac225e90e912b93dd9544703fd3bf3afb1ba694838883346. 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/QM4TW2516455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580cf7050e564738e9fadb63ad3c0ee143ef927706d47452d7e20ad7dc189364. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CA5KR2511105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bff797ac898038f22518e3bac43575f637572d67dc50efdda29818c88940e3. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/CA5KR2511107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2761e01507c47b2eedd33f371e99a659166d4247847493be684635925979724e. 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/CA5KR2511128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a333eadc15e0c6beb7be9a9994d0674db2cf26f0f5ad164ae1c28d2ce6a623. 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/AUMEV2503479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9e9a762570853dbbf21f3e74bcb26a9ec645ca4ba2325ef65b1d165ae5f91. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUMEV2503586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ab55363154b45d037b6d4403c1677b6f5e32dc8250088fda1fa9b95fc1d9c5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLRD52500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a34947b25437b38f4d3dd9ec33e9c636645f9f18a2c97a6a45030053470257. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLRD52500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfbd3e3b8658883db2a466b5e480d4de43d45c405827e826ed2a8485ce73d05. 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/QZHN42586199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f339869c42af3ed1af78d77e5c72ef89d7c25ceba1eb231b738e1975bc506e. 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/SE5BU2586338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c29a5c8092f4e6e22fefebecef4f4cfcc74af8e61e7938d446776b107032da4. 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/SE5BU2586339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2efbc7dc46e63fa675acb0ececb85fa50a1205629cef46f7f66e172e1dd28d7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/CA5KR2519601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3649e97f2fe841162864baf12ab0d36c22a6d33ef1d40a4ea106d5d524c0d7. 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/CA5KR2519602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5210df7c52ff242da9b44eb7dfc25c0f6c2f7889034b80c738caf4db3f8160. 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/GBKQU2527327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f2e3d6813ee82361b840fa7df74693f011b018bb0cb0af80a76dca47128f28. 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/GBKQU2527329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa193489fc5d3fea72ee0512b28dac5100b1c3b424c119b0b98240e72b16cd2e2. 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/AUMEV2573228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d6d94e7d7ec9cf99fdc393e181de04cd3dce47a597c985ce425fc3ac878cac. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/AUMEV2573230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f981a8abaeff38395573ad540ac146931f932e702d34e1ad0fac8d5ee9f77. 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/AUMEV2573231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227cf2ec291652996e9b89637aa0353f3aa186f5ba9373a1c77389599596af0a. 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/AUMEV2573232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2033563616d8d45e5641745c3deff98fc8c76a1d58c5b7d845a7c9a1d74da1c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU2545672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945a6f56c2b0b3cdb7a618bb6d2a9f627518ec6224de21bdb314d333ab04895f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DGA052551195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db83ba6aaa086a334039a2add36ff7a2d098e873458d1ee9148f9c0e35b5278. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DGA052551196.