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 0x3b0e735f7bc29e45f25a642bcfa8ce28d589f4dc503f64af1cf554aaa9a2e6c7. 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/b176cfe3-45be-4475-a951-52b217544c35.json and https://artists.proofprofile.net/proofs/artist/b176cfe3-45be-4475-a951-52b217544c35.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 0x95067cae41dde77639085bcfb4e5b4e7dfecaefd5eb1a5f7a12007594533a2af. 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/QZK6N1935259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5504ac61e2e77ad3353df62f158b89255d731317b0212f53825532c0e42b23f2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:15Z), 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/QZK6N1935263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c28dde43adfa52473b095873dbc51702fd3c2624c8925b9e715f38f6adb24f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZB4J1804939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89d4c0d0394bab738bb7dab1bfa960708c646b8b26cad378eb06ccb45a3426e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:49:31Z), 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/QZES91919393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24720589f3bd8b9b81007cc886f893241636fd012b16a56e8057e6c2e413a57f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES91919394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cacbd6474425c2d595f081ec2e0e58ecce38eee49ca51d72e25ed264f26139. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES91919397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34f7b2252de35b7410bd2b3f11619858d3a16e521157e93de83e0dcffab2315. 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/QZK6N1934225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c8bd4a8b10290d2a1cca9fcbd8bc2bf4f424be1a7330ca2a3978a37d5b747. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6N1934227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2864b1495684a239df67a1265512f66bd5f01620bc4d808127563ab54f0542. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZDA42470359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69249aac23763869bd9392302884269f406993e6428e440e5f000c265b7a8b3. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:09:52Z), 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/QZES62464301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2549e71929e32b9b424e417a605d1c5123383152cdf350e1506fd8dac9e61a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:21:06Z), 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/QZHN32481077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cdfb52dfecbd88262a1493fc2f7ece50d63b11ade8d83bdcfd71c31f464f3e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:49:25Z), 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/QZHN42436732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9309b758c8cd3436228ccd955cdf33b14de597caead27af709b0ee20654b2c49. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:40Z), 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/QZHN42436733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc2e500a84b5d3775e44407dfd61f9a0d5a552acedb42ab9118e99f84eae663. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:13Z), 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/QZHN42436734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff94adc515ebbd21e6c53bea2192e1d3a1c19fa3355471ffc2b2280eae4725f6. 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/QZHN42436735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b8211b63339768ac072fe18d09a46835b4ba4cb31b8e57d056d19ae56464a. 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/QZNWY2494194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682147655d91339aa289893380ef9c1e3c707eae0bf5eadcdb83d78261f5d9c6. 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/QZZ772494720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d396089d4035aaf7856f19d2b6315ef942903dea8b0164ff4598d013349855. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:12:32Z), 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/QZK6H2529882.