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 0x2a862f331f0ad65389799718cfa56f9abedc19c511b7141c35fcd81f2c1539d7. 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/59c2a4f9-c22f-4e38-a2a1-3df5c40b10d7.json and https://artists.proofprofile.net/proofs/artist/59c2a4f9-c22f-4e38-a2a1-3df5c40b10d7.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 0xca410e37daa91e7630236361b37d90800be99d8e0a723ac3bc3d0feb65581fba. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NLW2R1707983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fa1500294539bf176c41a7932c6620da4bc3843123d9d78f2279f10480b72d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLW2R1707984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da6dbe062cd1fb18a4aa7b88e15b5d9248d6c1551a4643f6d2fc4ba50a645d0. 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/NLW2R1707987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578ce0f721225ee643e90157847998123c6b4ccd8a4cb2be20c83d0396925073. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/NLW2R1707988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc29d680b109a7ab4acb35f1c04739f34d7ff9878a3fbefb5e3e9316916fb34. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/NLW2R1707990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582b2d2fe71d3fa7e4b8cd959de584afe3698d173306e64789eab8a0eaff97dc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/NLRZ82400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c05944d13b59ae7c5e632294d9b0202bfbf80798303ab7be52e68c6e87120a2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLW2R1707986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10436e2af4c72507ab784d49c0eaa916e291e34ee29caaea0f23a767ea50fe7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLQ271000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9983ebd5f7dff5d563d0890d53ce1354556b475d2186bbb32a8c3edf826d799. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NLQ271000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891d5a38983ac6406bf8c5286a5ef4ada9609ac32b5454c45052e47f0ad64002. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/NLQ271000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76d8b28734b1c9b366d5d529fda73f8d8c566c101da3987667eb4545fc6ed34. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NLQ271000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044bc8879295dcf6aa9d7402a22461f980956ca8788b9ee6702c734056203b8d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLQ271000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8fc6eebe4401c9a4349165c8ba8d129c4ee7dddc4dd5cdc10ead0dfbf4bd57. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/NLQ271000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f49acec9d19de11f47a253df7657a70d0a677cfbaa74a7a1b2d7be5e4e295. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/NLRZ82400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ddb48d35f2f4c1601d3dc43274749da7c9cfc85cae1103b3325215fd3e9e54. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLW2R1707993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7760f440a66b8eac331a5dfcdcc7f1d4f09fe6b6df54cddccc66caddbcc6cdb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/NLW2R1707992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073e9b577e34769974b4af3c5fa0e4f577215b9da102c9bb7decd8fe3e16bdab. 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/NLZ291300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b466841fb1ae2d05071c1e1f79952699dbf57cf087e9e0c5ba6114d2772a23. 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/NLQ271300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3d0a78ecc8684190b092375fb6d315c349b060937541507f10db7f45fba684. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLQ271300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd59622585259108b47facf9c8d664183b37185e8dff606c800a9a37776b7e8. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NLQ271300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a0c85f5131be1012eed3a8d9ade8fb54ea22363d441c380a918f25ef4eac2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLQ271300055.
Ga Met Me Mee (Don`t Take Away The Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5997f7cc59596ad5911fe2ad6a200813a354139c8b35ff4d8b0d87f8dfdc2f86. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NLQ271300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4d77c4a0193f74ee204e8b56b44a10eff4d2c0f0cb38ce7c55e4eb76d00866. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLQ271300058.
Draai Je Nog Een Keer Om (Dreh Dich Noch Einmal Um)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc730650207d10f94044fdc626e47ea12a67a5dbba1a127ff0c8f681838427ff8. 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/NLQ271300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9ebfaab9013616a9f1b6851acdbd15dbeb5ae0589c50c33aeeed3261d1cecb. 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/NLQ271300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25546cea1610f3e160773f14a58863e5367945c0fb5da34a19e90fcc1c81ed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLQ271500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be20ec7805f029a42c299158ac7f8183ba49fbf8a6d34a19b421c796f8df98. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLQ271500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653ff320a57917eb8d78b0cc14ea1b5f1e8a573ddab31e986eae542d78cd45b5. 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/NLQ271700440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9a855881d95c50f3bcad821eddc5b50ddce94c6e2c81b118f6853f700f5c34. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLQ271700441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3269d069a25bb8a0bd0b9da46967e14e60917d755b96c6bd92fba779fbb7050. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NLQ271700442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede82b16a19f21d6fc6f31a89c3d861f78afca84b82653b1c1e61ea00745152a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NLQ271700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04ffb0365ef5164cb9b77f0b8ff36fd350562f4bf888abf7b8dfa4edbf04781. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLQ271700444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673cbd3116904bb8b09b702fca1896d62cef1f1d09467b2c0cef535fa2a02a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NLQ271700445.
Geraakt Door De Liefde (When A Man Loves A Woman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86422c8c52d82e253248341476b99ed002b16ed25c01906e720070e066493d7d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLQ272100070.
Zo Verliefd (I’ll Never Fall In Love Again)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18574dc6c1f6aaaba388b28eb2d1c41120b4dd8e206573e38c2d984d7c66fb88. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLQ272100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50f3cd5e6c94d3a3ce229bdfea9d90bb0c25e94edf30643783db8c065c2ae68. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/NLQ272000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a455e6ad27b369fe36eb8842dd2d8c95370c7f32618b275735686c3823934ce. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NLQ272100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d148b849450b116e2054f8ea449a334587675fdc76398cd1f5539bc62490c. 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/NLQ271300048.