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 0x99bfa0dc41dd8fbd9a52f2db277050b13a7f202e4256113f18472f6c1752c137. 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/38ca862c-9595-4f8a-8f59-06e030166cb3.json and https://artists.proofprofile.net/proofs/artist/38ca862c-9595-4f8a-8f59-06e030166cb3.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 0x2357a04f18a7fb791c415b3eb7966d091beb5a36556bfb5111c9cd8c8c6ee41f. 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/QZ5FN1827781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49e1bb25a4b826ade95837bde8e2b43db69c9d43750f1522444f5e76e980287. 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/USLZJ1815996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb747afe1cd7e575e61cec16b33d5b3b02c3c39a1e054b84c346c727a64c73612. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZ5FN1925732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbde04818ba013963402f105c2e3b96db9f37670b79f55cdaa4f2a8a148e3a6. 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/USLZJ1955323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4202f6707218277ded5d7f8ef86d24e18bda4cc0f82da0a03856ea4286dab421. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USLZJ1955325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427dc22d6dcf733d102ce197462406af7789d8990e33a60789e24d38288fbbce. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBWUL1917579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29270fba1de512c41099a88db77e9d8d5166288116d44128e2644d4fd7a2fbc9. 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/GBWUL2046136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e26b2f7b852a40fd010ff1e150ac7c2c82b2f5f53502019d93def258200bdb. 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/GBWUL2046138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da00607a335325580a78d159cf6cf2f97c62b49eda0e46c5d6dc038b86c8404. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBWUL2046141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd47b8ae23f5a3208639deb2b8b5d0dd1f82923121af5a3f16a230ef9405f50c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBWUL2046143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13966b8f1e209dc9d2e031fe7d6fa248136090d8934c033960589d130917ffe. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBWUL2046145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a5b9e5ec49554f766b967f739d0a6c31e3ee16a2b476dccb3dafa269575f2f. 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/USLZJ2021574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62afe5fb3fc7a161ed43eec07b025f26123aeadd248cb19a7c58a840b513688. 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/QZ5FN2193950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285600235fde1e0c719dcce4c056b5db81e18800ce3ccd83ffd75c0a665028c. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USLZJ2134808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53488bd70903abbdc873eae4c5a90da4626daca0b66aa7f8335f05a3dd4c730b. 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/USLZJ2134812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef6037478fbe83b0b217164dcf631b804ac2eaf781df405167992f6e6c7c9ac. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USLZJ2134820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca61a81ea50fa93013acb8cce8e51066801849b05a929651b57f6b92fa60590. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USLZJ2134822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f4b97eb28bdfbe36bcd6417deae597f851230f605fd6cdf69636be469cdec. 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/USLZJ2134825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b0425b36dc4a8dad6607decd826c3e3b0cfe91366e427e49d15b682641213. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLZJ2149292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8b4ba18cd1bb7fe0993ac39092070fe5ee08e2e0a517d7da0b0b2eae3d3d87. 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/GBRKQ2195222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3df3efc9e553f21c98f17619881485a734d11bfd1ca276ff3f6832ec7dd0a0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHZ62252735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd13c71348c19f37cc2ca020091042d5fa9c42b50b1da61b160a4e2bd46adfe. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX872344618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43296c86529386431438370441921691c41fa0031d5135407bc6f597dda3019. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RUAGW2300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f117240c4ba15af866dcfaf13de931729bab7784e6ab6533940c3f940e90f5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/RUAGW2300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae1a6aa9b2964e59f9790a4976e6ebb7517006413a466de301f3de0e66efe7f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RUAGW2300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389bfbb146e7258589311e207c6ca469fe4a04a4e22c5877e5a10a6cb603e69a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RUAGW2300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7363f183323dba0dab6b672a9461954661206bb26a2f313ea19c3aa763c5b31d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RUAGW2300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36a4a563ef5bd2a245407a36da80bfee92e028b11a060cbbf52d01ae9ad78f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGW2400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51ea41c31a57533cb36922e96bbdf0d4ccc4842f158f44f11ac012ba9482bab. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RUAGW2401256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4853b9f4395760ef045db98203699a0e0534c49811f6a95e8d0b8694c95284f. 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/RUAGW2505591.