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 0xb45332b48395f9cfa320457e611d1a86b80a7ced33271f6879ebf0a76d88de6f. 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/549ee4d0-4e49-452c-90e9-b21abcfbc764.json and https://artists.proofprofile.net/proofs/artist/549ee4d0-4e49-452c-90e9-b21abcfbc764.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 0x601285efaf8b9916c0c70d99c2fc97d72ba69567bbcef99f409c50cee490a14f. 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/DEXW62200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee75d6e5e2e3bddc55dce3d66da5be254d3f8c8f885ad08273e517c3b6ef6c2. 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/QZS652386544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea4951fcee303d66eb1a5cb1f319b83bf287e26357c316e5a61948ac24c146. 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/GX5MX2266080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc2d4af28f91df16b87cdd83ae0dc2156611c394f560ead6881a84e12547be. 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/NLT2H2100658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf921db960aee08372682129c97a6656a90849c28bb8d796328895d138c0ad9. 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/GBKQU2390858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc771cb33dbcf31b6ebf26d2559b1a6bea74906b5da18222322726087a864f8e. 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/NLT2H2300484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd43ff650621ca5ca345df577c20bba4ed0a4840c7cb4e02f7c2b9986e6b012. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMHK2217644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9f304e7d05957f69b7cb874a1276403c7c21cc8cf688dfaa9428629bd4bf14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2300957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85752fa7f3540058c4e238c1238747e414cc6adad3c1f2d1df02f8387101ff12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b2abf76e2d735175525cb92eb246947b7f15511d7211280386e187e3f88c57. 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/QZS632345368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910d059f8fc6bfda581416dc7b3a9a7a98d38bc0d4fecf71c2768c40e96490e. 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/QZMHM2329192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb38e73fc23ba4b5ef7f6da529a51540d1b950f98b09074629c67156323d294. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL2QC2100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6739a0e5035069f88fdb788339e55038b5b663f52813c7957a4ae172e3c24604. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:05Z), 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/CH7812108645.
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 0xa615850dc3a304d93070a28f368483a75fee2f9e8627962cc2f5116b5ccc65f1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLE712300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8dc139b95c94fb9a677328085d5c4fdc0a4f19c4719246c0d7cac298cc3cd1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BX0BA2100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be2a1fb06f645317f9f9271c0e6b2fa7e04613350d3b1640e4baddaa05bba8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLT2H2300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ac586d771e9174e0e5503082d1ca354368eb4c4f648650eeb3d8bd1691b9d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMZ92133881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae43cf81927138e769e64c1f2d0acd2f4173f8ddc481392ed9d1bf30d7629da5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM7282057976.