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 0xb6e6df4d537520fb2e2716d3b17b87c945f6ed55c09e5a21db1af58b863d2812. 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/f6ef83a6-e6b4-4510-b6a4-313a9745532e.json and https://artists.proofprofile.net/proofs/artist/f6ef83a6-e6b4-4510-b6a4-313a9745532e.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 0xb7fee7793cee97c6a449b25548c86bad0dc6253b2440c673a06b27d479e4599f. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:51:26Z), 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/LBA0H2003345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a174445a99ff7981146f9b2c2b2b862c6e38d5d7fcfe2f147547ab56925661. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/LBA0H2003343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f372e328a759effd41edf8144c90522703e2c167c63553de0a0f91c2ac4a23. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/LBA0H2003334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8936c610c86df002b71536fd672180ac1b6d98834324de54704a1006ff4fc96. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/LBA0H2003326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7df1ad27d1e1ccfd11a0dc7a5e2b94694c09bb3957051e2ab6942b59099eb9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:49Z), 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/LBA0H2003327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4dde64071c18e09e388652e6f307a8ed34f02ebb8ac44832d60f94b74a2b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:16Z), 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/LBA0H2003344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4c8616fbd6153c392dc5185a28c861c44388b528c36ef0d60a672e8f2219a1. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:56:56Z), 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/LBA0H2003338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b26e6b30d903e14d713197f3cabd934edc138a3e8fbbfe647fe30344db4554. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QM7282478833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f2760642da4d2de23b68443f260ff07bf6b507879576324567c93bcc6b92c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QM7282479093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad827f12928041a91ec1b5190fa6c5d77188cc4b654634a3b68e8e51625d25e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX762445982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae1c26472dd44a61d56bd3846c785b735d0443d82b6edbf7a1e2cd7b9524508. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM7282469554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4f2de697b8fa58957f428dc2ae1fae2b6fdf03429acb251e0d13a0707e6b88. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM7282469555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31e8d0ea31cf833b3a29cd4a6bf2087d33c043f412e99109c1db3e07ae9dc5c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM7282469557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b4e7e8e6c7f7651f7cde1ea4f511597bf3e26d07b306931dc59cb276877b9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:01:21Z), 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/QM7282469559.