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 0xaa9ef8a0fd1a53d27e0f5a8cf73242a62493f2920bb194ab72c4aae344c34da0. 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/19cf23ad-b0d6-4395-a06b-97fce19357d7.json and https://artists.proofprofile.net/proofs/artist/19cf23ad-b0d6-4395-a06b-97fce19357d7.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 0x001f67afc435b0046938b537d4d02c389b1a7bb861ac6d9e7ba35d03e57d09f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SKB840800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf30da7b7f9ff3a6c4f4a660c611cb5292e743306b253568f69e19f1ff57f080. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SKB840800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeace71064464652fa9048ef5c2d2d9cc9d0c8326f939255cfdf0fde002c24c87. 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/SKB840800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7aa3eef1541ea9287f7289dd80eee69fa94d22c328a179697d1844732d7b9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SKB840800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b0c458f97bb62ebebc3deaa5b73e891a6ca37c6b30201da8db596047e0175. 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/SKB840800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeedf1a9138409a0499460fd03e8388754b5807f9f6c1556de9ab3c5f68c29d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SKB840800101.
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 0xa485086a453301d0ebde3335bf2440fbefa4e0902dc9066c3ba07a9c1b6bb02c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SKB840800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e83e67c5db76f6c3e9475db5050241b35fb3412af09c1d47d284d76770e8d3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/SKB840800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a22bd8fb8fba10573c0eec7d7a40e6c1ee83fd32800debfdea0a316557ef4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SKB840800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f0c6d0d13ced22750e5e90a26332f51eeaae0a6e3e0f7cc38d838883ad3f62. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SKB840800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13149958556df31c8a1eaf05ab778a58f6666f5ac4578a13f85892b8913f4f60. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SKE721600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056a59a51d5a5f52b91429dc8e71c267e4e4ca90b3305b1d451d6db993353d9. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/SKE721600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f8b45708ac34220e062c40c4a5107325110d49a1f9a9a047e243f3137a898d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:56:40Z), 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/SKE721600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e634a8181b7de8eb5acced331f7af2e9b6470c5b40a5b6f982ba194be845bd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SKB841100813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff704f43e60db247bb96c7dd4ba320a68887c44efd7a7583690ba527bf5a7f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SKG441300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcbb0088c651cade1c825d0ab27401d24ff7635125bd33a7b06ac58f34b69cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SKB841401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb059e5e401ad34c5a58a656f00ba168fcb51a951d6b387d78637a542beffe8bc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SKB841401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a46ada4908d13b132c5e5b56ee14b17445dbee45b08baf2a1fddbc1154229. 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/SKB841401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34da0aa0a42afaff4988cfb33c266750c6137fc2e8f81df71045d7fd2b78d127. 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/SKB841401429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3659816a2ced6469661862f5b4fb7493396afd1a33d6d5bdf84c2ca1dd8d06ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SKB841401432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd361c01ae44fc15403832a2a623346bc2e0b487b397fc84a5197bcb5d7c13582. 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/USDY41879178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4704ec6ba384763310d0f1efacf8f8dbfac9fa11f5858b4ef19603c6c608ad07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SKG451500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e087f12e5c8ec242a2d4d7a1535e23a277defea1ffe02bed318d13da186138. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SKB841501505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e277d4558bc2427bbfbd30f38edefd6a95571efff039ad47d1ae29d3f0dfcb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SKB841401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9219a32d05a458d06ba259994533a5aa9896ed429081dbd1270be3214d9bab9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SKB841401408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299cfab4d8bbcd540c13ed746b9021d2532503b4e224d01829e5f0b5f40a5cd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SKB841401422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a929e21aa4dd4c6c7f0b09f1db053b8b5e1c56279f54ded4e3088e0b758a5bd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SKB841401423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5b839664e8c62c68f68ed857cbb1e259f01ab78be66ccab7682b4231b602b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SKB841401437.