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 0x39148e399e6a4805b0bdda0313bec54992e941e1e0ae3352b85ec07f7ad2d94e. 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/bc1c6266-af65-47a4-8256-b6a1973d1e02.json and https://artists.proofprofile.net/proofs/artist/bc1c6266-af65-47a4-8256-b6a1973d1e02.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 0xa9a4b1c2db5a444fd79c62c38af65002e7b0f79a045376679e7b26b9adb3b547. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD51968884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf318b8b8e56073bc63fc3d893001ce7bc165a32c79fb1a93ae5283274f55d. 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/NLRD51968885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31351d2f0948523945bc7f0cb184432278cfcc4c12102513f40ac2675a9dbb7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD51968886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebb2ccff740310004a71f8174fe5e5c09a9e30f375d6a60f74010280fe46001. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD51968887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ed9e3ddd16a8ddd41e1cfea948da24eb7a495c5721394d532c9ea1bf80fd1. 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/NLRD51968888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc1676fc27a8956e706e49e6486b292fecd065ccc6d57883b0c256100d44b4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD51968889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c3be33c594d04ac6c525acdf3b53488f66267b1bafab8d4aaf5759b264324d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD51968890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e674b881aef29d588fefd88d64fddf55a779eb22846d697e4180d68e5c3fbb. 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/NLRD51968891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe939e7c83ba4b2c79ddb2a5036ae7285d33e7f9ba143b7e29f956300caa175be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD51968892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20bc83d054366287c3903bd0f75c3fc7a6d08e77417b4163f07e22cb66f8af0. 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/NLRD51968893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d4e9ada636995473dba2c12e022b212b467b14ee5b8a69a905e3b819829b2b. 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/NLRD51968894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4fd9ed471e71461269eda9a400cf32a97235622e1bbb7045e8679dfcb60ee. 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/NLRD51968895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ad4ecd936b9fc9aebf0229339263dbde778b7390549596b3aee0b24e71de52. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD51968896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb1574b6aabb8008e14df6e36d6bc94e91466c7d451af7e7af9d90f6acee09. 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/NLRD51968897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4b1c2db5a444fd79c62c38af65002e7b0f79a045376679e7b26b9adb3b547. 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/NLRD51968884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf318b8b8e56073bc63fc3d893001ce7bc165a32c79fb1a93ae5283274f55d. 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/NLRD51968885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31351d2f0948523945bc7f0cb184432278cfcc4c12102513f40ac2675a9dbb7. 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/NLRD51968886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ed9e3ddd16a8ddd41e1cfea948da24eb7a495c5721394d532c9ea1bf80fd1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLRD51968888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc1676fc27a8956e706e49e6486b292fecd065ccc6d57883b0c256100d44b4. 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/NLRD51968889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c3be33c594d04ac6c525acdf3b53488f66267b1bafab8d4aaf5759b264324d. 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/NLRD51968890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb36d03a285ba4f962ea518dbc44f7caa24e6cf725c1caa3defd25eb00bc24. 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/USA2P2349407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02873a49151a62b88d68e33f3b25aa9a033387911d98eadfb11ebae3feeebb5c. 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/USA2P2333116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e87c50a07a443e42299522ddc03ba8ebe7589b302a19e2dfc37132a0c5368. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USA2P2349409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762abc38cdb0b6c563f7905d12f544d0426f4745682c453e8909330c72a76839. 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/USA2P2347822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee031dfe2141da7eac209918d2ded5d7017af8019c3a4834d7a2eb753d8192f9. 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/USA2P2349410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeba8bb70fd731c5446d4e4cbcaa3985695033ef10102f65dbd2b764c14bd87e. 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/USA2P2349413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305b58c9e46dc1391908f5bbd32545d3feb98a63f8fb55e5850967e715f433f. 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/USA2P2349414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbcf2b8cdad26da893d3822c397e1641abac749fd96cfd90981d4493a73394c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62497230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9ffe5395b27893eea6d763a500dd830655498502bfef6574dc6e79e03c66c2. 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/USUYG1529061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5093ee3a6ea34b930bf92da1de5536c38fa21ebbb7d8225feaf914c8ac818db8. 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/USUYG1518469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45d57c691ed8f53b63adc729813c1922e2b2765c8eaf6f7bb962106ab225776. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1446838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa09ca5a20fa2b55870a6b3467ba31cb789e432076b93683549060bddb3221cd. 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/USUYG1446839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517dc52b9f0fa9ac147fed95fd95279537cbda2cb536032c6ceb829348ee5c91. 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/USUYG1446841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1320df965c5b2a873e5877be977894c0bdd2545270b357e22ddb71e089d5860. 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/USUYG1439317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1320df965c5b2a873e5877be977894c0bdd2545270b357e22ddb71e089d5860. 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/USUYG1439317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e490d30d4bf80479c4b634eb414712ba79692b3ead71c22538d25231d5639d. 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/QZAM62100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8ec64c8d2e83f5e810fe1b0a528bc34303d2b0465cd8451f58878c1173cc9a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAM62100438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fef7d91459e30b092018a176d3f9e2a5d544519d1537d6531e992c2bbfe78d. 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/UK43Q2011090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc4f4c828b9a2f5d96dedf712de628a7832463960e07eca734847a3f3e1cd3. 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/UK43Q2011091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9deccedc32f678c881b62af61ad2b8b75ed405680a844b0ab551bec88a591ff. 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/QM6P42476436.