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 0xf44c74809b86ddb6910b8319515edeab45150c1e201a15abe857e32fe19bda76. 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/92911e01-c33a-4b20-8062-c884a5b16f00.json and https://artists.proofprofile.net/proofs/artist/92911e01-c33a-4b20-8062-c884a5b16f00.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 0xb3ac6d740b3e8da1763e40f2acdbf842193cc00408370262e1dd75b9bce2b0fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1ZN2301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c52f3f8ccc3d1d09e884a5a05b7014553ae1d893a6d995861734a7a3e4a21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL1ZN2201988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131fed4d4743f36c317034dd6e20090b47dba5392ffb69a12cef8b8b096d0cc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1ZN2201895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e27d2e50e1579402ec56e2883da0dc9c87ed36b4ac7d2a76bb98b17ae767ec4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1ZN2201793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f132cfe64e02f29a5fde591a44a753f445af0d9bc6a3de0b7793b20f38b911. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL1ZN2201763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9418912f3b7b1e2eb20db7467302859b21ad4b1e3c19327e0318ea0c9430dcfd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1ZN2201636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f319a521f88c7836fc920f86fed6e5d3081586ab22c4cc598a5b6275df9a46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL1ZN2101600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa969e2d2ee41af4ce13f5b2e493305b44f75206fe69e7d6d98032c3a0be0e3a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2183697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1d6765c6e9e69c660238bdf0145c8e9992e445f9cdb755aadf846783393c6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2167596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3af250dcf47c63b33a9b81b9dc0536a095ad8fa5754574e579e5bf1560c48. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1ZN2001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc82bc9f60b068c0a977d70df2cf546184a22873092998456761f3d400a2427. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2127817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc26601b11516505eef3ec733842fb26a9fe0479e25c1a8471f5d67d584fa5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLM5S2001049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21506b4c858d14b521fab64b3d7e6d175bac1be2461b7d44dcb727c553f3fba8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1ZN2000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0996bb43d1deaa9f9ddc154838b5dd80a9ec3e02b81dde5816ca501aa283311. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2025918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54795a303847124f255809642c237533683780c8885e72a2ff5f35260acab953. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLM5S2000763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8399ed97d9e4e29a1a2b8887b023287fa5abfc07b4f86a5cb7315a14882915b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ541901768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c747e6e170659ffc3da5a623c22ccfc4add1cce12c6bd1805077fdc0cd122. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEWM91800294.