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 0xac424abb19096e56dee39b4ab76b0707661aae377843a5a77728ae6a341563d9. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/685fc864-b0e7-48b4-8ad6-1c33d4ce0e3f.json and https://artists.proofprofile.net/proofs/artist/685fc864-b0e7-48b4-8ad6-1c33d4ce0e3f.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 0xdc175464b5d1c8a6cfb4aca74e8632888a2c184c296c579d080b333f155e3093. 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/QM24S2103402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bec86c141b0aa9c73ee51cf8a0d74686a74dc986743143fd1f640bce21b971. 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/QM24S2103403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd142acc6c22cc5eea4f909d81a3fca85a6fb249294e0c7aa761227a64f4e8c4a. 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/QM24S2103406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f51982f81d8df7cb0c4936065e2bedd38039b8301b9a812259bd1c4a9cb083. 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/QM24S2102420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf8e5a8f5e78881bc6a8dc1cfcda66eeb31c3d6341bdf6909481bf75049b8c. 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/QM24S2103408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e864f514168eb3bf74e3f42eaeb1a35a315a779b5979c2081ce3cf9970ec285. 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/QM24S2102835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef9def45eccac5e59034e6206bae8a2a9dd841703c6abe0aa8b8e5f091fceca. 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/QM24S2103409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e864f514168eb3bf74e3f42eaeb1a35a315a779b5979c2081ce3cf9970ec285. 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/QM24S2102835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f51982f81d8df7cb0c4936065e2bedd38039b8301b9a812259bd1c4a9cb083. 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/QM24S2102420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f058a3a440b1a09a1b9d7a0942ee590310852122f4d07151a2232634873c5c9. 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/QM24S2101749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f4af248ea74eb289509aa87b4c85aeb421c253f0e8b1bdaf04df44b18ae9b. 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/QM24S1831060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b0586408e0d88b0556c0ca8df0fcf57527094dcb8c167f30d2c27dd492262. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QM24S1829241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b01d2677278af4bb4388c919274477e92b3ccd58df7f6051295dfaf4ca7f12. 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/QM24S1831062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289005c709d37b27650bdc7eae0d00122b1676faad0123bfe27894866541f330. 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/QM24S1831064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b0586408e0d88b0556c0ca8df0fcf57527094dcb8c167f30d2c27dd492262. 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/QM24S1829241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fafc034765d6f4b1d65e503d3617a2d90bee842523dfb69ba06fe8c146e8d1e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCADC1719755.