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 0x57e20822a6cefdfabe116614b9cdef8e947fa7a95ba53f43d20ccfb50c095ffb. 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/f54a215d-e3d9-40c7-a086-f298143aa734.json and https://artists.proofprofile.net/proofs/artist/f54a215d-e3d9-40c7-a086-f298143aa734.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 0x7237160f9bd42b3b43bf1bfbdfbaedb1a007919489ae7deef855b7dd606c4148. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMHL2047235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38c8678eee830f97099d6d7f1d944f7d58886b5a96ba0d4f353560f5e42c126. 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/QZMHK2052394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0cf3852cb5448a7f7569c4e9cb4ea06a4178f0cc7d80675fd864570694102f. 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/QZS672104028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd032eb15a021f5dd649605e29a1ab8735373e5e9c841c5891b0aa6dffccb08. 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/QZS672278843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33725a05a369af0e09167b83353ef1bfa3f8b103e7c9120d4563b0853f78206. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMHN2253489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3383105d8d4ca5164f188846a94c9844706f8dbfc8ee67c641b44b6f04f0eb97. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZS672238261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76c3b54ebad3889de11124a0b88c1a29a4c6d8f05f52ee696d64d4cbc5d939b. 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/QZMHN2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2dd7038df85fd3563f05e0e17e52b10050e555012b76f20a473e341d50c39a. 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/QZMHN2339291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921291c6bb6851fb99bc1292199bf3d7d606713af076bdddca7de2107f9bea96. 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/QZS632371732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a93cf982f15cfb610ca0b78bf915df80d41f8f1a320e08a70f9aa8194e5099. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMHK2327272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57c029c4102b4de7dc199f5e87dd087b868958a9624ba08247a900c8106ab52. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:01:21Z), 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/QZMHK2319181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5542c454583d848025879784a27d987ce4455bd35075f1ee56e7a6046083a9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMHP2352111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b5c920ed7cd6dbbd25ad1d492b9f252da865f06bbff353eeea86712ee93c56. 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/QZMHM2439102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39c8cad5ec3a75d1c8fe9b4d3126695744c9c3677db294706d4bba5bbd45d93. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZS672451491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc953327135420c1c153ba242cd37938463d5c24d1a2e0cf13ff65a9425ae7ba. 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/QZMHM2486931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a55972b9439fee1a2e05e8e080de9427cb2a7c000b1be67297cf9c67fae4771. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZS662483571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f997c05c640b320ebcaab8c065c050f88be3a8bec7d5c76d36640f56b5f80e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:14:51Z), 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/QZS632490684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b79888c15934287afb8cbd0508b5087629943b1c8aaa103c4411c7babd4e3e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:38:32Z), 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/QZMHK2497993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acb2be172e445593d4b3cfc4e2fefc383b66eabf1bea8184d2c725bcd64aa92. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMHP2426198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a10278e6df87a9cec20cc59f9e5e35f988a4dcc2a9755bd6349ed73f59d91. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZS672426657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811e213e494683f2a7d05215845f39e9c3fed3c29d52c6462b9a7a125287db2. 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/QZPLR2595092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e06c9650097f3c54fe4ef82f373b5144edb16e5b71dcfd0f0659c2e936b55c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFE2562769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2c4c2ba39a5dd93314a084a38b32f22f8d5a5f7e34bd9f4547c25528402b03. 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/QZZ7U2560961.