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 0x3ac354ac3773ad7e787d7ac29dc950eda9c3664500542e9eda0088e211536091. 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/1e46ff1e-ba37-4958-938f-e7a1fe8fb17c.json and https://artists.proofprofile.net/proofs/artist/1e46ff1e-ba37-4958-938f-e7a1fe8fb17c.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 0x0ca5b5a3710f7aea3cb5e638f2288c744933c3b2c2646e3e74ba1a4707e2df67. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/NOCTE1407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f387fe952339169bcf9d8ac03d8028cabd83b7bde185f66b836e3ae632345. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/NOCTE1407050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca5b5a3710f7aea3cb5e638f2288c744933c3b2c2646e3e74ba1a4707e2df67. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NOCTE1407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17119fb48b89d53ddad3ea70fffa120d933b649112b9a6f542b40d5169ad8eb7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NOCTE1501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4f90479b9965557d1edeb9b089a80dec48ddd73b2b60535d4129b2b73dc0e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOCTE1501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f1ff52a907b101c52c78bf9b1de19f86109ae31813430ebc1df4d214034da. 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/NOCTE1501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3c04fb6609167a988dfc2c2ea5b2fc3d4f8e6a68826a1dd98d1e979ed20086. 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/NOCTE1602010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84588877e419c2d123662b255f53924fade119f26ef8a6a8571e3d342132e29b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NOCTE1602020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60669c6e4893ec1a92b76748165277e2ae7b38b9e575655115b2370f57bf882c. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NOCTE1602050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b18b29705ad99d00ed35c2ed2087b37a2b06b0661b99100fecd2a23184c103. 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/NOCTE1703020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ec333791e1b5baff5bad78285e3f7be0f93b3941031a964952c00e24a5761e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NOCTE1703030.
Ballad of a Millionaire (Song for Elina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30afe384de726773981ffe972fc28db337792207758d67ad6b395282450c496f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOCTE1703040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa72e463b791356115987de2d2923374da583ea356e3d7e3b85c3aeb3b76e9c. 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/NOCTE1703060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4e054994324227fb431489db07fd2a5c76a225e4e65be172e94e311ba54e71. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOCTE1703070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbaa8e980b34b4e841cda83ef10bfbedbab0150a4a2df259f016b6484f74af5. 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/NOCTE1703080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01506e3b3dc0ab5094d156ed46d82dd25ae0e30efd7fd7f9869562b3fcaee1e2. 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/NOCTE1901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d844a7b7e092f26c5178522512fd0ac11219fec38d543868cc2ce9a0ecc199b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NOCTE1901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead089160d6ed0c64ebfbdc96d1e994c7d370a9037ab29b4e911d3822526ebb. 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/NOCTE1901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3257562b99d858b68a993dff4cc63349ca2b167b3f5f636923544105eac5ec6. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/NOCTE1901060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b69b10e8c1153b3d11118665f3665fd61668ab13e418956fdeb71aa1731682. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NOCTE1901070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ce29638f7e84f83e49141c8c8d1f46d93aa448f6b6ac504f52ad3863d6d3a3. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/NOCTE1901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9338a6e1d7b502258e64336ea8a1e0207b52d7773d78a8b749c071ec608028d0. 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/NOCTE1915010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb880b4b4c91ff98b950964ede4a418a3632ed10d64e60080a381368f5a7aa010. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/NOCTE2103020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac0336e6433d6e2cdac87bbf6db0b3657086103160668b8bfd714b673efe26. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NOCTE2107010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26849ae6d6eb358b9ebdd031d4783c1a1d0b629b9b2c86079ef8f0b91fa8bd3c. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/NOCTE2107030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040f1dfeef4b537efc501dbdefb2125b6aef05ce22c5e97ec3eb9843a0f62a7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOCTE2106010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cecb709a09792f15a46dc6dc33dfa9b882cb6d08c972d41856bcfb930889fd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/NOCTE2107040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fb7d7afb3864a2e586d41d6d7a99c229214fca6b9959339783429c92b1872f. 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/NOCTE2107050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6959a8d8cc8885cf5a4ca2df4511a47d4b4363835638de6582b5a3437f4f09ed. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/NOCTE2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef4cc25ecf8dc6a6ea7ad1fb42b7abe546458b25b5f37a93cb392427a4116b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/NOCTE2301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5347028ecc4b4fef187955371b90fc32a7b0f0422e5978c4ec0cb724d9422a50. 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/NOCTE2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a86072ca8a5eb834688cf1a36d75f2c02fd7f141a84bba3042c6981d40f076f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NOCTE2301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4e3af53a694ac6605b4e5cca1add2e246a216effce884418f1bd3743fe952d. 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/NOCTE2301080.