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 0xa1830d276fc75d1d5ef4d31b076915fdf8dd89ab991a29b4f7d43bff18685c59. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e27f66d6-326d-48e5-a232-b79de03b291e.json and https://artists.proofprofile.net/proofs/artist/e27f66d6-326d-48e5-a232-b79de03b291e.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 0x3411e0510276ef9f8ed15d4ae76b59c1ae9e5e4b343769147ae2f1912d2f1159. 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/TCAEN1910075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa407a2fac5d4db66d316e0e31dff5aa6c5fb6b9434b8971f5633bb326afe08f4. 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/TCAEN1910076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc3b149f985029c35c35dfe86c3ce0aa04ddbaa65dd737595515875d2c396a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZK6L2207800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1dc5b5d48696019bc24cbb1e545cbc1075d126681c09bb90bc38864e36c4b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:03:19Z), 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/QZMEM2235501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bf6c00046fb4343cb4251721225e250535a4fd357c270bd9e6ac72823303ab. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:45:29Z), 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/QZMEP2255175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1679f73915542838897e1d6494b5a19fdf987c042ad308338219765229393b19. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6P2362711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7023c471b0d5a843aa0e6a1ef7da817eb151c49fc121e74f7da66ba9da6b1c60. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:21Z), 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/QZMEQ2326795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8cd7ef4ef9d498e11e6c513c3a09f40624007ac795bffc0251b786d76b331d. 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/QZRP52390596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61dbed694e9640d05224d66a631ae61f347c87dc0d3bd3d2816608a6938676d. 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/QZTBF2379046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885577b271fdd59a256094f967a12eeec70485c0cdaddc99cd7f7a2f05233efd. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:57:47Z), 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/QZES72453386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23c857645ef0d779d0b7d10b79fe9f64bef4443dab5a839030391de2f3b840c. 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/QZES72453388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d421990a0a1bd82aa8260cb95bcbd60cdd1cc19a458d93c5ca0ba62bad575fd. 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/QZES72453389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e10ed67093a7456937ad9ff6f5c0d7ee0e7c5fc899634bd2cbe6403e2e47e3d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES72453390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249f54102041f713e5d2ba10343f17896d07792107795da42bcda112e840180. 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/QZES72453391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948f99ce382622a4d40d4a10ea646c5ba638c8651b9acba905560256631290e3. 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/QZES72453392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d956ec778d547dfa7dba591642c0e412cbf3aec7b80374319e91adec3e2fa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFQ2476396.