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 0x243fc77fa49b00d73ec6668a22ef1cf7f7b4012194dc139f82cf7bb631577432. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/858ec68a-3171-4bc7-ab65-e7de7b94324f.json and https://artists.proofprofile.net/proofs/artist/858ec68a-3171-4bc7-ab65-e7de7b94324f.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 0x0015197d328eee61f1e8046624fbffa1cff396ec675892a4388b94ba02b90617. 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/US99C0519302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e339ed1e02d4fbf69429df0096389c9f20a0cf10ef3c38d6e120ab1fad8e3. 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/US99C0519304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe695500b2f30fcee93c68b69bcf45677d3ec86603aa20f3bdce41c9bfa61a142. 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/US99C0519307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054520101b7f309f0dbff57ace2476b4ba8f32bbdc5b0e5bd603e58e2e868fd2. 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/US99C0519308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2658eff88979bec3ccdf196a4dcca87150777e0646de1b46b5e90a28455bbae0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US99C0519301.
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 0x6ac088951b8d76e0c54126a56b525daac2c3f3a249280afdc99795b3d6bd08b3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US99C0519303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bcec8d3f97a3c4d2ae13b660f24e08fb302c8f52571b9db502791796cf9d51. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US99C0519305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faed08e7a8bf4bfa62f818d3fdac701abc9e9e3a9529a64a22ee08fcee56505. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US99C0519306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977fb67c09281582d67215859373f16d3aa57ffa81ce8df10db9887408d00df. 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/DEE790515360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7580579353a18a51310edbac9d8e4799831a53111877af1798eb5ec9e30d52ae. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USPR36786863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130da45d6a55231961d28604733c81d78e457e2ba93cd4e9be7b75423df4390a. 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/USGR10400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34adc1356145e3b81c1a50e07e9df00f389a7bc7d22af3ad3c7538cfcbbe9557. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USGR10400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441734e0770b6daee16816164ea34b1e297107b5bb13eab560858cec46bb616. 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/DEE790515300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021bd22d03fcf6f2800871211f6708faa33320cbadfffd0c930e2644a660ac21. 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/DEE790515330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fde7a89d1765b59ab6c75ed54129f369bfe56f5075aef30516aec9e4b8aaec. 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/DEE790515340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea05489fb8f4af04a838b3e5c1aca3529f20e981dff21162622a0f14398f79. 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/DEE790515370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92eacb671770cbe26a5de910a2b0d30e3beaded81c494dd8afcd0826313f393. 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/DEE790515390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c5f1bab88c5fbb3606d0ceab169d3895eee03ed0cc3ff46e7fbcedecc5c792. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEE790515310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769be130f022ab3b42f72e00de9a5707a62065b74c62d36da67f00ac87472492. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USGR10400607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6226a1538496b44c81a4f466c530714290ccaf52d0a2e9468487844d494a90b0. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USGR10400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64f9e64ffc48aca70dd1419602d7c42172137e23c7eb83e7b97a1b1e280f89f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USGR10400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d08dc40b3c9d15f0006826bc079bdf75ac43fb09ddc7720447d7ba8db3f5772. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USGR10400612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58bd3a33939ecb2ca2cda4dcf1feb726f43ad2b7ff59eba064a3c51302a3b2. 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/USGR10400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77c407a2cda515938ed100b1a447512a19ffe42da8ddca522cbe02b77948e7a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEE790515320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0986eaa7ac50f117d19c3de733fd4af2d590a0b86fde524fd71f77b1f99bef17. 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/DEE790515350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3459a139912e28fa34c62320c95d8cea7dbe43c44543457f7a1cda2338bb0713. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DEE790515380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790eb4cfe9a42959433d5c9857fe33aa960afbbee4d3b3d87e2e075a25360248. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DEE790515400.