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 0x6beade0193ec7c79662a69891eb7bbc650a06f9333d0c3b19fd80df0c401ede6. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/401e04dd-7d38-4184-ba51-727f92bb9b4b.json and https://artists.proofprofile.net/proofs/artist/401e04dd-7d38-4184-ba51-727f92bb9b4b.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 0xce436a266f630e1b49f1bf7f3785408007268a5b2ea6f758da66511608d3babc. 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/QZMZ92069782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8792b49e01476a9fa22ca1f736f68db7b8467acecf07e38ae5bcf54ed75b323. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNJW2043501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d4ae4b8f5e45c52f5a30dfe4bc8c663c47c0fbef725d763ef75350896e8cd. 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/US7VG2195605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb56fd84ded58be57d339e57f65e6ff144395734f4fb96fb40fbf55b142aa090. 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/QZNJY2103846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420470dbb23cdb3fb61f817a980ae1a5ab9d6c901eddef611f250d1deef6d3e. 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/QZNJY2103847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8671e7bb8c832497eb687663c8de3abd9a3984bb21364ada2ecc52f42d9ded. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNJY2103848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf240edf7836d21816b54c20af54c0d6457c33a319ff7c29ad11d6202227b9. 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/QZNJY2103849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4304c277109f4dc4f956cf1f47da0c95bf150f58ce60eed0653fc139bbb74f3d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZNJY2103850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aec5cec2d6e3bbadb2fc3cebf5b7e265a947a013e1fd0b4069747fa8533639. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2170163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2d23a12073340fdd44d5e8aa656586449972fc06fa431448a7810d02a31b2a. 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/QZGLS2318186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7152af6445475ddc6db5b1844ff684a471d2b2bd6c185b204f33f1ad7605ecfa. 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/BC6M22404402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bde7ae231a6d77dc47c51a678764c79dec4cd9916bdd41c16c130946e44204. 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/BC6M22404401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709351da66e4f43ea1cda1092026db95b8748b54d900c3ef02ab111445daacc6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BC6M22404400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1744555c2e2873689d3054b9228fb90ce326c74bacb4278f98ba9b368ed17c47. 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/BC6M22404399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6695a9283bc9fa596c4533171e690148b202648bd80f4ae20f859b130df2929. 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/BC6M22404397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9dafce0a33c14517c22ff7f2a29b4b68a778331628e26364f6e734a2d30e30. 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/BC6M22404396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325158ed33be98618ab00a9d3f763d1779107b688b822105a30047a7c468130. 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/BC6M22404395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fcf33a428eeca4bf70162e286910fbcb36f3f265befe8d8f009fdd2aae6e74. 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/BC6M22404394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4c9bc83b220bc807cb932aa6748f39f38f5ad49c7b4d0ff41f94bd732667fe. 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/BC6M22404392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd775df573ce514ebbd19dfa80a111d5d675deec6d460e27a59b50813ca56fcb. 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/BC6M22404391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747db8ec5e15da094441e19574892c3cc47d1be41d5c533032a90d9c8ff1057. 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/QZGLM2319941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4973db944a4ff4b9e13f811ccd1a5af833186eaa9ab59a35f7c4542fd73aa689. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZNJW2272307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b30c6ae94254921e2b58d9ea140a4b9325ee0a409d0b6685ebcc1405947532. 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/QZTPX2168837.