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 0x7278b9be74741ba3d4a0968d7317aa8cecbbf0e91e9cacd25cf73d1184506d41. 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/d6d2f65c-6376-48e4-bd30-38884e27eb0a.json and https://artists.proofprofile.net/proofs/artist/d6d2f65c-6376-48e4-bd30-38884e27eb0a.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 0xe8b8441834798b4d1fbcfae390a1561a7e79292fa7c75af15e578d9093855d33. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES61923116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f32a1635182b6a596fb6873201f973a733ab186308eeef30bbcc5d83e736b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6F2065940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec38d2e722fca7a6ed1b02b2cb98b7e5521d5f0784ddc0571c134902190b12. 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/QZNWZ2212096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fd9f340a72bc107bd74f7af03c859d9dda736a4e3d96ec2e780b28fa0913a7. 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/QZMEP2352974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0890b36d850390340142f78c5cc497e8b264551fb8f588f5067ada03b5be6118. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZK6N2417285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbce0820e97be278758ce41ca4f2101895ddcdd27feee45f2f626ceb017f2ea. 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/QZES62286861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec38d2e722fca7a6ed1b02b2cb98b7e5521d5f0784ddc0571c134902190b12. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2212096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1714dd9a98a980eb3a312aa627416170095eabb7cdc6446141c6f7b550309977. 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/QZWFH2369054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0890b36d850390340142f78c5cc497e8b264551fb8f588f5067ada03b5be6118. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZK6N2417285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890e3814e66fc273a5719172a6bc0b4c765020477a85b0e90e6259cd543ea866. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN82351755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fd9f340a72bc107bd74f7af03c859d9dda736a4e3d96ec2e780b28fa0913a7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEP2352974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a8372354c725ce1e8fed1ab96eb950fccf17ac9695688af4ff1a46ad8f7236. 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/QZTB72330701.
A Tribute to Blink-182, Pt. 2: Fund Music, Fight Cancer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac72d94069c35c8f1858b07004abd05ef300088079a4751cfb9538a7317ab312. 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/USHTA2400696.