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 0xb309a7cbbfc190693dc22fdaef3b9ded9e216983fd5861d94223f745291ec583. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/504a451b-d7f7-4676-b8c0-17ff6d3fda3d.json and https://artists.proofprofile.net/proofs/artist/504a451b-d7f7-4676-b8c0-17ff6d3fda3d.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 0x77b9cee9b19ea7019af75cd5e514c820835ae3ec53f463b7c320c2b2fc115e46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1915428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998c85ece2069a580e7d0c7a6a33c65d472fc9c40a6b9269fd9f0a11ef467823. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU1915430.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb414bceea27719610abdc2d196ba8ba145d04f6b6b4c83251673f7d1222de7d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRS182048964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c57970e5ad88530d2406af81490b521b87e7e76cce0ed2b303567d6fb4af4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P1939798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78880f48ceed1943a39f4e735d6e808532f81fc37add599b92af39c67292ef24. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P1939799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b83591e07435323de9623fe659e50a676a73c19316921da394967b8bf9d59f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72080871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe817eb4ee0909af415d9a077eee966ed8f772664bf0db59d320ec754fb524b46. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLV61707325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf93f0f98d01d46dbc1379d229746acf677d92723da07e71d700c5be02a9d256. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV61707327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe986226e109cd17c2e00479dc4ffab3394e48c6ee3133c8e76f4eb4d02cb22d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1770998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c385f67ee0962131a1322327c047774b56cb4f1fba919a841aa368fe38b1cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1771005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf844565bfd95f485d18261ec2eb71df57b01f9aa73e931e33b854f07abd1cc1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1771006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288f6c432f591058f2ae134f12139113b7dcfa1e3206139b02530b0caa9353ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X41551352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1711410d413b357d2627b026df904fdd6fc92e0be1ac44b34880aa90330a8885. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2X41551355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f23637a8f3cd4c8eee306f994b218713de1abcb1a81435d0df755117b6834b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X41551358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51241031a7b1ca0a23b5022de3f76c24ef216587b61936594de7ae371b1da263. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR2X41551359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa961767ab2f72bcbdc50bde52690fd4844fbe867ed0b1fde8b48c937698fa4b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1803696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd8eaecbaa6e1caf3642a278f9d7ef72bc90153caf3a8b89e311fe64fac68b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1803697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57322218ce94d29f697082384951f20d002c576e31aaec2479de01ea9366402e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU1713479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef80a02008c571fa548e7002310c54b4e908baf249611207c50b3f97ddfd543e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P1820719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df6059929199e5be21c0203823ee3a4ebfd34a568b016ade48fd82575fd1a53. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P1820723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973e4a9ea4fcf1580ffa49a0b1cf22924ba86135d44ab34f8e5d9b1a1e847ab2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P1820724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9e0288bc41ace3b0649ee4bc32971eb88ec47fb4f9f3a61e4c3025b96cb522. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2156744.