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 0x4a9eb6adcebee65be58b1e525756c7ce8bb20e57e4d4cee0e5cf3184638af45e. 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/43aac623-b08a-482b-b04a-b0caad147fca.json and https://artists.proofprofile.net/proofs/artist/43aac623-b08a-482b-b04a-b0caad147fca.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 0x7b913613f44ab0095076479396b443154598cfcefd9e8b8c5db29a84a3d1dff5. 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/QZNWV2388398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d231624dfa3742439905bb87bd6f13cc8f1789b6d62a78c2690f90739c3916. 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/QZNWV2388401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb03bc9e6ca68ba605f0ddb4cdf8206b720b812b47a46b88a933c1861ed4c9. 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/QZNWV2388402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18958904bb843edb83b205cfd2b56c822e0d21b33f6147bccedff5a269d5a6b. 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/QZNWV2388404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf62242e87f66bb8be3a057b5150337745b700defc183da3af8542caf638e6d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWV2388405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf046172bf08687f30bbb11fee092d174d06854e1c5fe57597774c4364f95660. 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/QZTAT2340745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a16953845ec593ce2e770bef6791ea4a50b4633700a728d41072b534000e5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTAW2320831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96684d5cbfef78ce375cd89388b80274772ab1b6c1051f749f7bc6e3ec422590. 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/QZTAY2323305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d5ca7b6f7008d1511a60e61c0faf6862ccb3b181ccd8e9bb4d941b7669a5e9. 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/QZK6N2460978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52f436b90f14b76ddbf52122acb190fcf528d3b4322e466769f77d3d8cb2c64. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QT3EX2465139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064c9ef9cddb22ca15195017a24c8b2703bedb16f24b5040e751adad2693863. 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/QZTBB2455881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4842fc8fabe1646a2dfc28808b36e05646a512039adfc42fa7e83af1ecb78ae8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBF2425861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0a437eacad9dadadca9284d65e2bcfcaaf3cac0f109361f2fc2a80be0da7d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFR2483103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf12f7ac1a624ac7235869074a562ecd8d04aac13ac57c9ae463192b40aada4. 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/QZWFR2483104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497de80cc36af78695f886f3cb316b9d2b51c6163003bc13dee8efbcdba848d6. 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/QZWFR2483105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649dc5b3cbb8d8e5e8683d070fad9a48bfcd74f88ca69f4446b101c2b989d861. 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/QZES62546794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4318c876e3ee41748d0b79c8db973f49c4efa91be9786901945674551064b11a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTBC2374184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f74adff6bbdeb3ee109bf7f1e254dd5402f88fdc99f6fa96fd9ac5b227196. 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/QZES62546795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a39ee849ae2d3293dd907040aad7e57b796315f256c1a4f0ae52eb1356a5c6. 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/QZES62546797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8798f7078ac02fdb5359b4cf33b7e83fdcf7b887bab728031f5a029c9588cb71. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBC2374192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19817f42de7a232f2d3ab9ee9f4599cbd8bd0c2330f52afc6b2afd286fe65973. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTBC2374193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109dc09ef7a44070c312684da611bd61655b1a5f03d85535875f23f29d5b78ba. 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/QZTBC2374196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad289452c2bcb19d1511701b2a77068b7920f8ba151bfee77d3e99a4c276500a. 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/QZDA52545069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54d943e3b654321fea4f8d00a97cbc503f26950138f2bf3b39c1bca5ccda36. 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/QZHN52568183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a435a306196c33edc6c5d57121d287daf4948872b8a2ce289d3d97635cb59. 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/QZHN52568186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17613d341044ace89151af8f8b0a9001809a284b7573b8305b9c98728a3c7105. 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/QZTBC2374181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19817f42de7a232f2d3ab9ee9f4599cbd8bd0c2330f52afc6b2afd286fe65973. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBC2374193.