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 0x5662850ea1e8505e0c8ab54778f3a421f5e62f12a1ea8d590257f0a93ab19126. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/783c29ea-335d-40bf-8724-20a35bd4c618.json and https://artists.proofprofile.net/proofs/artist/783c29ea-335d-40bf-8724-20a35bd4c618.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 0xf587c96a991abe8b839c2031b5c6f02076cc9b840669adbb27057f85d7bcf6bf. 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/QZTAS2111750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a0f5c6ff09340fc22618a07aee2169a84d0f77aadac8f83236f48b7dcd65a8. 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/QZFYX2269432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737dfefa203528d4df73d28446d6bbb25ce502adadbf6ed2878489d03146ac0c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEM2289253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a265dad4b9e6df329948d9d4ecb1055a74a10b4e4f7fc980fd8bb66f1373569. 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/QZTAW2326798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f018a67385afd3cd544ebbc4b40ad5bdf9e8ec30430de7ef36e13740326f5. 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/QZNWS2136608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7b81469ce30673f09242cea621e665884a12eae227c76603d51c5144841758. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:07:20Z), 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/QZNWX2106844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf119e60ac92e25b64777e5049a0b7010da822e483472fe2b04bc1419fe6d4635. 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/QZNWY2140052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7dec7f51f3343ab683e8f3d518e7584a53c6fc9d74c995102d8d05f16022b2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB82241246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f0bb5ed7fc74a817b25018347e9e42e30868304822cb68bb53d7fc4d5ebeeb. 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/QZVEM2361937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57144c7f8fe0950d42c1e2b27e4288fad90c9995a78f6ef06287d476e2d24c32. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZVEM2361938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ff37966a71f4060e7240522395ac1926ca76eeb3a7582da6506dd246014a52. 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/QZVEM2361939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ccb47319cf36a29103da708a28213c15ce91f64b93a538fc4548cc1d30a508. 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/QZVEM2361945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed91535dddd055b8c0921a7174e12202d6724bf81e83ddea07b1baa27419bf8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZVEM2361949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e1dedaefc2c981230990d33b2e5c3bace543f7f8db701829546a1dba2829d3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:09Z), 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/QZVEM2361951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bcf210794806c119817e7373f7a969ae07298d411eaa82a8c5c4f6a93eae3f. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:23:35Z), 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/QZVEM2390700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf560b96bec45db83561f37b34f2cd03fe794cf5c0af484c14a67fcf54ddcf53. 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/QZPEW2404992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447ec941989b239fa0d3cb1ccf556c7879b446f7172abf4fcfcc11b4044270c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPEW2437734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bdce0091073be77d9c0ae13072949015006edf11109a2d3654fb2d97e439a6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:29Z), 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/QZPEW2478825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec3ff68f678421d8855f5e4ad988e8bcd109549eadcfc7b4f0256df741fbb83. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT2VB2438542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e8f94cf0cfe6016c69f0581a297b44f64a48ca2620e09fa44c8d4719d45db2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM1833390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe361deb8e68510ac1ab6436efc91b18525f4ae402a8545375a1871dafa00b37f. 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/QZVEM1893361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c95ee5cf996ada9d331ff7453731834927f652d9f495a633b53eea92ca3f5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZPEW2559437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bad5afaefa5f01554c1666b36141460e5ed2ee5ef6160982ba5aaa108f32fb6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QT4K52532542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f27ca1f9572c1a9c61a2a1cc0114eb167226749a3a28ae65b7d1562efab566. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT4K52532544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08105ea3291be675d2564cfab683a5dfa77d0cdc2dbe9e8a7a90276f141a847b. 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/QT4K42507061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b5c979064e151af8449f98731aa78702dd362cc97754400ed4fde24b3a9098. 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/QZTAW2237952.