thumb|Red maple (Acer rubrum) leaf in October (Northern hemisphere). thumb |In recent decades, the number of warm temperature records in October has outpaced cold temperature records over a growing po
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 0x5e223b6adcff3117f5a9830f2b8dc2595f59c3add1aebfbdadac85dd3e1bbb38. 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/4f29db07-271b-4087-a98d-6db860b3cb07.json and https://artists.proofprofile.net/proofs/artist/4f29db07-271b-4087-a98d-6db860b3cb07.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 0x1dbaecaa8a618753fe61972a11de2edf0a5d0e0c44d61fff1babf3559686a778. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/KRA252000892.
Red October - Piano version, 2020 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5fc3b49c79a618f269ded667f7fffd89f1d5a880670b4db702ce4a804187ee. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/KRMIM1811822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3579e876d4d1f4864432c2b5cd59c251a956711bf54942ed38b7ccaadcd46c8c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KRMIM1811804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4567504251108447aaddd2e53cbf7af66e8843cfd4eda92d9cb68fe8d166e87. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/KRMIM1811808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbea0db73739be5af57f5feecb6abb1ea9b757ef07d1fb825c8633a14c239a3. 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/KRA252000913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337b3f1bb22a73134d625947b59fc7e8c685c78d49c4c9b01cfc058352435cff. 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/KRA252000926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bcf42020eb555aced114c4217e2a30ae6a007abf2423fcf08e6bc7e1c0dc6a. 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/KRA252000958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45512d9f20008a08b1ec546a9c9be6568a065ecca053a57b0f9c940c724fdc3a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/KRA252000941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3353569ad8ad8a69492f35ea1c839cfe24d262b59b95d6f86493eda28687c00e. 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/KRA252000898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c0104222418a434adcea4509d4cfe62d6ce3534906e6e3c0eee02e14755ea. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/KRA252000899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e25a3c32dc129e2d5320eb80a7e86ed7259408891c3d19009deb639c54b51d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/KRA252000900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ff439d08a5e035081602cd06044e25901f31a9bc069eb3d3368279d01197c1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/KRMIM2021554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e77bf470cf1565bd5e2bcd251257eddf9ec262ae9a5acfdeff72f8841fb346. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/KRMIM2021555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acbd5d66bb80e02c7c6cb5f96c8d9584db104ede48e8dea41d1b1ecef7dd089. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/KRMIM2021556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cecda8cb180dac565808f3bed5d1d82092e21595c5c60fef980b0fe4dd3fc0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/KRMIM2021560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695d625100cccd5979abbc955558314673aae1b928f5112663fe292feb171284. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRMIM2021561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198c8225d5e40681367387016115b9aa432f4aee1d5fbb32cc71323196a2a621. 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/KRMIM2021566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633ac20eb7cfcfde4406100a7f79935d7c621a97103ad746146eecf725b22f3b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/KRMIM2021567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee5126c776ba8fd4183a6524e505d4a0d7a1eecd833158a220a5f303b305237. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/KRMIM2021568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26297a65aaaf6c650ad335cc3ad3391a51ae4b8b69401f3b0ad084d899fc2f73. 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/KRMIM2021569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8378b80754a367982fd309064e1a3aa245c2d0e818382f71f6c3288de27e4662. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/KRMIM2021570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca245140fe909cd3ea90aef73c1a9a8136350c26c4b199ba560c2e8951f03d2. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/KRMIM2021572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a519ffa8c30a5472978e78be62f06bde3a855a7fff857229a06755ab9608e. 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/KRMIM2021573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb316b9fcb31f9b6b98d8e1dbd11383518dadd915549db9793f2e51b7a555656b. 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/KRMIM2112087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb45a764efdc85928c7504a2f2d16489d50da482e1f563a8130ec6d706ce3ff0. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/KRMIM2140775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eecdc153134b16f7c0c829393e4499a2e97ac7d212cdf48a412194d70b5420. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/KRMIM2214194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903c80c742787414369f76078a16c35d629075cf98fbcfbb69f5ed1f5178bd0e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/KRMIM2334304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747aabe5228a70ad24b3024eec73f84bc7d1724de79d3d997f7ceed73bd0f350. 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/KRMIM2334305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab28f4cb192f637f182c95613462e3a03a18f9175dd903b300de17cb34e068b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/KRMIM2334306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c899dad25e98b1dfc05fe93684f50d0af00f5a19b0608d644d1b402aeacc72c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/KRMIM2334307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c689a87eb7b3daae3c74b00283e2d9c4345229c18fcbf9510ae3f031a17776. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/KRNAR2311217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e08223c4ddc5a5a3cbb2ebf298470b29598314fed91c0b1d08af90b81b81c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRMIM2500689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9407da7f6b97c539baa706972dd69b7493776d9a1946e435d99a6eacb97691. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/KRMIM2500690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9a87273c0d2b41b372cc6307e2b4c365140af0d9b9ac8b800522925804cdfc. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/KRMIM2500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f489b409f6c4220a856fd224fbc5a70703a41a217c8b51384ca2917c795ac4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/KRMIM2500692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb68e2ffefb1d6161a8660fec9633b9266d3118fba083d91ac168cb23a8f624. 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/KRMIM2500693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfe8b8e5812d3cf1e05f1bde6e14ef57a539b936093151d0a12ceef28e115b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRMIM2500695.