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 0x14e74d0b1921c2eaa5ce66ae6738d9456b8644fd2f5f57df2b89074ebb559c0b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/080f364c-6b64-4b7b-8387-691691e6325e.json and https://artists.proofprofile.net/proofs/artist/080f364c-6b64-4b7b-8387-691691e6325e.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 0x5565b2b676cba5021cc938b12cdf5c588e5c8e2110060ce4ce8225cb70288d80. 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/NOAPI1794628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d610f9731997e24b2bad1f25f1418b0429e2f885f5b28730363eb3a4ff3544. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NOAPI1794626.
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 0xc75ddb7c53ac9d51414a2613f133ba05e850cb49164eeebee8471b86b0458f6e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NOAPI1794627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87646518522066e931ff801e3e0e0fa877fcff24a2d5cc1542beac2bd1cfaaa6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOAPI1794658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ba1328eeac01b64fb5679722c5731c78494b8b76debb8633e356ed25ea9b85. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOAPI1794659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f129b5cf23abcd0f5f2d00ed8737a71bbea3ddfdf7e08c3c05b2385eeca557. 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/NOAPI1794662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54df532f4375dc9e2bb2d05e53b4c7bc494f93dbef3a49dc96dd5e0ee39a70c. 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/NOAPI1794663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a176e1536bd3815ee47d6c6c2de952bc6a0c5674628518415fc563fe6ec2b58. 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/NOAPI1794667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c9fea41af1980d99e5be8c257807494fa1d8f5b25cac1315c9efad599e8c5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOAPI1794669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12a51f7056e54c5a4622a70881a930a424725aaf690e3c2fd540ec28bd45bcc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOAPI1794670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb478153862d2d8943374dd00e25e78d4233aca2257ee11c9d18bd0b29135c49e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NOAPI1794660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86caab9a00503eeff9a8ace474d8df6d202e1e92d1c7d751c0615e40e2949fbe. 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/NOAPI1794661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960d21dcfe16ac870876e76a3a01dfca313c8179de96f7fa1d82d45bac36b7d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOAPI1794664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73447417fe4080f5a5d97408b8e8af5e206a32d0e6486db86cd53d9fba83e0d5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NOAPI1794665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f8632dc9338710f1573d43f21e6754b3a64c1dd9efea0183128d18550bcbe. 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/NOAPI1794666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786401d0e13c8970cb4c2b0528f02b52534695c74d63f4101780eb58f37419c8. 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/NOAPI1794668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba88243ea6b60b62712cbd3ef5d26bae143ef502994df078f085acac4e6f581. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NOAPI1794671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5007ea62aaed2c284fea939d2a96a30c9936b4c406a340cf89315a542e258. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOAPI1794673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2665aeff030405bfe61dddf3e3ea0bb7a43716f2a464740b0b06eefa21a4606. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOAPI1794675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe8a2ffbcaac4bbf2b28e94b608d513defc3f6d0b3073dcdc4e7923287966e3. 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/NOAPI1794677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db214a5c2de28273629d9efdbbab2bceecd1682f395d7d3f79bb3460230df1. 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/NOAPI1794679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a861fb6049b3f47738bed47e99db79b053c6f0614bf416c2ef19098ab514d7a. 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/NOAPI1794680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc078983877d367978207fc9581bb3ec04a7180f7421d86ebec05e6202ea4c73b. 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/NOAPI1794681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e49c269b6942da8d4ba84a4a58f56949fb853f1b8643c3ad2ebb86aaeed92. 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/NOAPI1794683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ded047d71a51c250634887932f80ffd2db2ecfbb043b778b45e3b49a07282. 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/NOAPI1794684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37604527eb21649059f36b93232c7831b383eac912cb2b998cca311b35f99f6. 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/NOAPI1794687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179510641a88f8ab38d3a125aa2e19a9168bbb6fcade8a428d54e3b119be4009. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NOAPI1794674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441014b31cbdff3e3781f1752812a2ada4be30c00793380323fcabfcc7149c52. 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/NOAPI1794676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48792b4693c691c48d805d398cb3fd6d7db1969c654684bed094383f4d1d8885. 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/NOAPI1794678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199736d2a76da98c09c005db9779241545b88d9773085b81b572f480e1f8b8ba. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOAPI1794682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135079c49f2da3c1cf2b0c3ed41a9b0a51639365ef74880a8ca32a0ed3457850. 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/NOAPI1794686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c24cfe7c71e69d3e640a50a163bd9875dd54d8be605e0317c1ae2da6e13c7c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NOAPI1794688.