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 0xaf963e929cdf49fbdc2030fff79ca1a8f18df2360f5c082672044a162efc447f. 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/d86683e4-0973-4f9d-83ff-7f5b90b0009a.json and https://artists.proofprofile.net/proofs/artist/d86683e4-0973-4f9d-83ff-7f5b90b0009a.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 0xf1619441b4af77b4c765a7c352bd1fdfe00d9480ae9a6674de23cdd0de470412. 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/QZWFE2498475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51aed847539b4db8756f9b30f38f661ddcd1d6ca9166e298a2734810d690860. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:30:19Z), 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/QZWFE2498476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2494f550cf069b8a7437b89f1e91aced79b3c555dbe7d6e084387540fd4d53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6J2409645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13f6bc9cecfbc418f3e6484e52658ae6d5887abf67bcaa7512cef7e806ad29d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6M2433736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14002ef1a4f9cfbf5a913f4803079d43d526652632d37b578d2bbf34961691. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6M2433737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be1b32c8491f20c336c198d8576205ece0bbd1a2841e0a68e296708d169251b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWQ2327314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ad5c79996906beff74a493b867d7bcbe9b4dbf613fbd2d304a974785d2e1cb. 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/QZNWQ2327316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d65decf9e054365a1955ed0c0b585ff2f7681746e579d1a009946d2c7fb33e. 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/QZNWQ2327318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e57b3566dfca03610982d4fa83300ca138d6b911413e192fd36574253cefc8d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWQ2327322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3086c372a8a29cd8cf04827935cd3416bd8854b72165c01b81efdd05282e2f32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2327323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d53a8017541cf4dff62a6fd6a0b745fe280539754a82e2af5bb18d3f6492d92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWQ2327324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55efa647a37f57e964e74886f2a14f4404d2bf3c7a376c4dd76ad6ac7adc873e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2327325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5e0427458d3fdf8e2bbf3064311fbefe57679390e87a242f15529f890aeea5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82290206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb9a54d7495ace9a71c84c4a22a64e870bd64402385b7f5b53f88669270a1ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82290208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f4303ef674e59b9e8f2309295e0e9cecad096c07eed4f699e68a40802fca9b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82290209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e28f39c4e1cc47965805e0b4e6fb9885693c8839ca590e63d24e1355a12c463. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB82290211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf6a4b561d064ca844d03fe3bf6d8469382dde89a95edf9bb81f365a2f7e5e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB82290212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ae2881f75f3da6031f62a57670255e4af3dc34a55a45aad4f92adebca3f9aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82290214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dcd2ad7794de5fa404940d4dcb31a8aec1bbeddc55e7d0a73ec74e9f4f93b2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82290215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fdf6384233cb7f2729e016e49f423a6ce761875b43c128f40ddb72864f8716. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82290217.