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 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 0xc5c789e72c82dea927e3f91790a2b4f058f182889da1f65f0b3f2026d84aa909. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06220390-90ca-4608-9ed9-4c04faaef0fb.json and https://artists.proofprofile.net/proofs/artist/06220390-90ca-4608-9ed9-4c04faaef0fb.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 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 0x86cc7146a2fccf04b7dd23d9f0d704edd2d66087c47fd6b96f41ea83234078bf. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZZ7Q2462634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61811b6df86ef9385db5eef8f3398e0d74a440603db04bb5e2550663eb3760d3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZZ7Q2464350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d134c56c32ff22c0b3b24fe6792e9450c0c568dcea7f3cde77f2dd95823f6e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7Q2462638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129dbc428dad15042e50a0a645b870b78841fca103b68c7a4f4efaf806fa808b. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZZ7Q2462639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1dc7cd7ce5e3c1e892515048d59c87982af733ddd4f24757e6ae27a6ce3938. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7N2410591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342b04624bde620e2c422c1a418bd00a965840b81ef489bb067f11175de90d0c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7N2410589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2764f06ef30cf4a4114e756934793d7971717793d173cec3e0a31e461de2900. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZZ7N2410590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e836b5a9bab0301e9ccec6baf9703cd71641174427c8913d33db83e46ce6d76. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7N2484849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854306943da9b934803927acad2ab2edbcbb167326dacc2d1f658df60f45af40. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7N2407535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63887820eafb55b156bd6864d687c21f286f609d1f0900b250b4868d2bbfa8be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7N2413194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb444ae79c228f6ae022a7a0c9df2a24506a6006a87dd6fbf8b42cf87fc062f85. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7L2492131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8fb13dfd8005d687f1e0cc0d4f8724bcbde5377490bcc4d90d274e4ba83315. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT3F22448540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4361d9724ff792b8d8e0044c6fae78c1528dd045310b9e0ba44f92fd37f22d. 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/QT3F22448536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b87e3d6c0360e2e386f70df69f3a0823b620f356943757077ab154baaeba6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F22448566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d58d5e8ce8f3fc4744fbb902364158cfa66347dcfff56f3198ef63539c8f14. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QT3F22483254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e690b59f1c2415ffe7c717520754f8cd1c3528a4d36eba290d85669957d0adc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QT3F42437094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873bcb81459a6af145ab1ac691e1feeb8729f2ceebbcf821209bf4d511f3944. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT3F42442927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a57c4a80ad3664eba559dfb4a4f56fe7fb08a21d0110ccab74bf1e46ad7c66. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QT3F42442940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae192b35e4cf5c03484441ec4d33cbd24d10134683a9e056f50359a18b36fac9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3F42444692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e4ee6a4d163b1e9ac1b9e5cdfec3654f41be86e44d8e7bdd9af6c68e812123. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA52548186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dc60d6c6268f7506bbcd517dc9d2479a8cac3ec700c7214dc8df09100a5cf3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA62548377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc32482b029517ea62b7e697c6bda584449948f8598d277fd449028924eceb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA62553153.