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 0xf535e6ffd4216bcb0ae7c5dd1c8654f6c20a89d18cd7bc3367f19810987a699f. 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/2ab79d55-3ed9-4cae-ab1c-ee311ceb4f3d.json and https://artists.proofprofile.net/proofs/artist/2ab79d55-3ed9-4cae-ab1c-ee311ceb4f3d.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 0x9b13068a75cefab93c5d01d7c1aedc4f6ab69f6efcab4a34a23bad6a831c6139. 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/QZTAX2260020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174c4bb8829436f089d6174a03bab729be79159f68d0c9ff883e1f6094a24c99. 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/QZTAX2260021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1858722f5b464662fe216c801091c3e2d4f087e4fe64451aae5e244ef954c743. 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/QZTAX2260023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106438d684222c5df45f7a6a799af9b942a5dd69db268ae54313336656cc15b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAX2260024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1ed98fea04540326668db99e7525c0418e23942500d34fa0f658ca09f96c5. 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/QZTAX2260025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9e839d4e13fe2dad4d85cf44800b20538a7f59db3cc203364b2516110aabec. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:46:25Z), 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/QZTAX2260026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84426496f401be984fbc09d1bf7d1ae392dfb14f11962273cd29d4901f43a628. 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/QZTAX2260030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63471525439ffb4738e10b549ea30657e3721aa449a0935d5dc1444321cde6dd. 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/QZTAX2260032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65928ce8ede7a6dc16de07d91d093043fe97d9efeb40c806c68cc807f842a4e6. 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/QZTAX2260037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a580c4af1876d8e84e61af866f45bfb66f58be2756c00ee0eaccfaf41e89080. 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/QZK6J2346733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273600e2a4982b5ad0c8fea62e5e3f88afeb74be091d4256c0933852fc78e4a8. 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/QZK6J2361455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3613c40077b950869ec7c9295f092e8f140c4b2f8465b7c40d0d86ae8022a0e6. 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/QZTAX2347803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1da22c084cdff48528df2b651962d98070c709b5f7a3ed1367c56a65165b702. 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/QZTB92322923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b7dc28dbaae6143aff0b6e00154e4e5a6f6eca4c992f86fca4fef77ffd303. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:34Z), 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/QZWFK2303576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c78ff3f8b14b6f11ecc5946fdec2b4b3556650c656936b91f02385d22ba0f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:19Z), 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/QZFZ42498222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe022e341ae4f34264c585e4ebe9f9787d55d5c32850e31aa1ed5d778f22e4184. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA82407254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7004bc0cb69279a2e4718a734546da4890d5cc8693bbb9d9b9afc8a2ae64e. 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/USLD91766004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6af08cc42b9678be76119ed1df44f7ce105fb3c49b5236be2ae7b9faa3e80bc. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USLD91767412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428bef0efe4cd9f2b1e5d5f94ccef047b9f5b1a73a5251e7fb8f61512f5b3f79. 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/USLD91767416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7004bc0cb69279a2e4718a734546da4890d5cc8693bbb9d9b9afc8a2ae64e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLD91766004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f83914ad6cf64a1e6efa3ae53009e418b5c0c7700b4713da755d8113e0f37. 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/USLD91767420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299bea567b3ec814508fd472740898b8968b4f9bf9690d830a1500dcb09cb92d. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/USLD91774351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c27e914d6034324ed1621e2cc59aa2860acaed984885fb8aed42c3fc9a82c4. 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/USLD91774355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4309cfbac04f0ee9b7d33f7198d05331460b629a399bc6b88bf064e4071d675a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:35:31Z), 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/USLD91774356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3f7b2fb86f190cccc2893064a813f0fc55b2b965a012072c605fa53b227b7a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USLD91774358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba946a6317a566f9afb2f88024e99eba223771f7c57377c4cbe640f9ca7d0282. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USLD91774359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7dda48c68429bc9179dee967183fc986cd5198e484b7e1cd2de757d79a8b46. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:56Z), 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/QZWFL2589702.