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 0x016907e4a7f07fcd5a38688014000263d186c7711aaf434856d6e4e3e5fe88b2. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1f83abf-3e87-4a91-b6c2-079de8ec5fdb.json and https://artists.proofprofile.net/proofs/artist/a1f83abf-3e87-4a91-b6c2-079de8ec5fdb.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 0x6408b439f6d71b255c64afad00c59d994c0cb825bdc6238d6ec200e6a4082e70. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAFH2031502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e85141efe7cefcf6e8f54d65402190f75a0cc493c4158334ce5b43184a7e73. 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/TCAFH2032873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90056d7900a897cfa109762ae5060696445e3f32987d9ed1f8a7e8fcac865b12. 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/TCAFH2032881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9166443d77ae071acde13c5578cffef0ba19bbba23ba7f978665c319e6c6073b. 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/TCAFH2032883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258738f0f235628ccedb93280160b6472fa1b005760d42c8224c6868c2cab67. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAFH2032891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e75683c0ee234bfd1ccc1f2e798e4e069a063cc34459f556196e52ea02cbc22. 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/TCAFH2032893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08bd69f74515cef323fb7bca6c3828e9ef2967853b0fa11890e4f00e59e5337. 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/TCAFH2032901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deabf14db9138347688a19ec41cfed5c0a22605e5a60a3b1e59098331e96f2e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAFH2032919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f4d4fb9a2efebdfc6a17747e28342f87eade2bd08743a5526c1d97627dd25. 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/TCAFH2032931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee16c11c185bcc45fc7c48a3676b3191b8be29f1f9119b943a5980a481afc010. 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/TCAFH2032944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97d86991372009a16387f60640f7a462715576400051cbf61b203d3a610a7e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCAFH2032948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0da7a751236b71d87e782e26bbb64dc94cfed751537c5f622a71723fb8021a. 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/TCAFH2032962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e5acb060532eeac077962da8a4ff123034c0d175759c07c0286d8806139960. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ1088543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75074fece2ad90bb33e5a45afd597e7a75459cefe96eaa32785a9bec3d12959. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGJ1088544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2507d2d3f25d5ccdd83d1a8e095591198886e4a60053fa56d22aff2de04ce. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USCGJ1088545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5e30ff19d85cd17a9678a4aa173bb49c5ace10e5fecadda6333bfb878748d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ1088546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d26416c79fe947c17948ee91b67791629cb582db6c2e6b6109d0b2ed3d80d3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USCGJ1088547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e325c51d423522de6ec673152b1046a36cec9d1a4324bf4f37a02072b2f9266. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ1088549.
Orchestre Tropicana D'haiti 40 Ème Anniversaire Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908ffa8ac76cc63e59e047076135cc2832659e1d55c1c5e35c5282f5fc7bdc47. 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/FR6V80417516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87efae5439c5b680475dc76e85698ab34fdc4c72480799eb5f5cdc983cecd9e3. 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/FR6V80417518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc3dab383ef775bea8a487e77c21618b5ee27bf87b8a0640ad04a8e7286852. 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/FR6V80417520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5071904b41afbd45f8ed519bdc6de3768df84e9f2f1f80f8801c6b06dad61e4. 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/FR6V82241528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade88f662c0364f5f7903a3ad4fb4151de87ab8b9060e342d8b597c156be588b. 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/FR6V82241529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9218e914cfe21aeb8741bf83008ccc3b8a1da092281cc3eff3041117082e049. 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/FR6V82241530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf10e7ea55a886b98e4015964359ead852d8ec382eece10f932d6335f5e5dba. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FR6V82241531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9f3b8a70c3490632cbdcf789cab810066f442879782c2fea71c71ab98aef13. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR6V82241532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026b4b2e33273e061b347036439348ec7326ec8aedd23b13b35a30363439b22. 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/FR6V82241533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d211ff43b362d0944f55705d79fc6c930bd59d7a9fe42695317a6e3403eb0f5. 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/FR6V82241534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8cfb8a40cf2a7905d4023917e03188e9d315539b20969a684617b0be042de4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR6V82241536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc510ff0f3bbb4bdf485019722d02270f5eaeb0d89748d3b108e14b3f52728334. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWW2229083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a3a8a949a8ea3468e2e66ff827c98bcc248937ebded8b2a9fb74b7b0cb681. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR6V80631114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe7ff7ce363545d87074835a9b7bc638a6cb84c248c38bf75a59f744444f45. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FR6V80631115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe449d7961526e5973db52bcecbaaf2587ed52995ea58f40ef3988938952c40de. 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/FR6V80631116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed7adb534492e3b1bce59e9a296ad42af26f41132ef5548249adb0798989f0d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR6V80631120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f8583db1e25127fa841ce05f38f145578ee0fc06ed8a954b002188eeae964. 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/FR6V80631121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32adc45cf5439ca20bb7dd680300ce245ff44d2ca1127607854d133b4ef88352. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR6V80631122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59aded00ebb10aa4bea73f26bc3b79a0393dd08011d62d2013d8227a7b9d97. 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/FR6V80631123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e10f23f3adf6b3288733d0bc62f07d0be4b79c4fc2833389903e852b8f9264. 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/QMHUY1650215.