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 0x908ca493ed2650b7a74e4cd0e7b184212c997436767a83cf472a0112fefe1b5b. 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/f50aa2c7-2bd8-4801-bc0a-6631e7368a7a.json and https://artists.proofprofile.net/proofs/artist/f50aa2c7-2bd8-4801-bc0a-6631e7368a7a.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 0x415870b4d97d6789c9841b28897cdf7cacfd135c913befb811e95445628a14ca. 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/TCAGK2252369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d90d28289cac4b85f912bc61bd3e7b197b038f90c9959c70a0df660a3bfb6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:04:44Z), 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/TCAGK2249239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424297328962143395f954190d7dfad8da2b0084b952a1403728b2b58a6b9cbe. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:53:59Z), 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/TCAGQ2243991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21a4a6ddd03520961d0d5a64ca945eb897fe9c3e15888c94c874ad5aa7b3ec2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAGQ2243998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27467d5e256f6ac0ca6d1d29684dd2aa6e301a29fc03795b2f035ad4e133918e. 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/TCAGQ2244142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f63c80719a8354e025323b60aa85fa3e8d4e3b7dfa2f9b8bbb11b6de0301cbb. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:23:30Z), 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/TCAGQ2244152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb687fab67a0c03765e63283ec2792ee8632bec831bd58ec5a384ac1d79653467. 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/TCAHA2354745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63206a8d7c51a38b8b1b569a00a5569305b3a1b9fa388dfd4cca594bfebcf93. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAHA2354747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4cdc2edd24b7a8c4f30efee70b96da64b0ccdda98083fc7f4eda86a1433f8a. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/TCAHD2384930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0348d18c09c62eaa0fac44fd115a36382ab1f1140940925347f537d799fc7e4. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/TCAHT2331240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d400bc9202eb5990f7ace74e0bd3f8858a2465aebb2d67494387aa896ff7d8a. 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/TCAHT2331256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ea172678772cb1fc5cb3343bb31f3c2330b9f959f6642ac41e6048f7bb6197. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:16:26Z), 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/TCAIG2416800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2e171dec278578738a4b310b4fb3cf4517cbf7b2b7855823bfd34a44fd520f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:20:42Z), 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/TCAIL2468917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec78bfa0d648abe4d76147ef36f7a30e51d7719009d925921d591257d12e6e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIK2468929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be481c30ac476bd64d7b23e01b908ae0a83bdb37a20b0c5e86f554b7c3a737e. 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/TCAIK2468931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9679aa75c8fd5c41be1949829aa08c08f4e8105fdc3b5ac953ce44087d90e440. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAIL2468938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373b32ec52b79dd3d84230d20c685bf7cb3b386ef866a58f73a049b70e251899. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:35:27Z), 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/TCAIL2468945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060548f1a441e7edf57800ac6fc1ad3edfe502af06c7c698e054923006b87802. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJJ2590688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e91f1f5680123d0186a743b85ae3d6c974ef0bb1591a7d87bcefdfade8c924. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJN2546074.