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 0x7e5be8508b374d30b3826f7d09bcb1626d2ce7167c6a0e76eab16b160361654f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81eb07e2-b8e9-44bd-8979-8ddab19e5467.json and https://artists.proofprofile.net/proofs/artist/81eb07e2-b8e9-44bd-8979-8ddab19e5467.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 0xed5c743288c7a31d5bc361f00f5bd9936bf840de389694d0cc55a55bd1f14766. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBTM61600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003deb755ae71841163169b586e3f9dd9323cab5a4f92845f4881777edf0f371. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBLV61619000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8c21796ddd77daaf8db29860ccd556c70d1fb27a1ef7f8a4858ecb6e81b854. 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/GBKQU1721582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb697433afdb67c139ba94355511de6f86720eaa2bc6cc7cbe5518bb72711b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:49Z), 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/GBKQU1793316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92064c0c0f427bc83029c03e68597bcc0cb8cba67a4e9c023bbcc10bcdf9b158. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU1832020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ac66c8b5bfabd6c50bd89dc7e3772786354f9042fc71b4f2d7b88b236510c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:58Z), 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/GBKQU1832021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec8fb34b393f15d1ff7b7dd4de73e1782e5cb6d64fb619b19a3648dcc30c9f0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBKQU1832023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548aefa3aa0375ca600ee7a71686d17294bf3b0b570870db8d111bf3167cf68. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU1812344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd399c3fe3d48fcef3e4e73f07629d7b0daaff122d4070e75dfe4f4d660cfeca8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLV62024204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881a7bf4a14e0243a65db1acb07be18a6999f3f81a37b9b959bc15ace754d59e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLV62024209.