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 0xbc19642b538cb206bdc9644c3851dfdb3a9a36fc4fdfb3463a7041118cc7aa74. 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/e0965841-0bab-4c10-8b9f-b2212bb034bf.json and https://artists.proofprofile.net/proofs/artist/e0965841-0bab-4c10-8b9f-b2212bb034bf.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 0x451062ca2ca8d24592f5b9b8e395995204d2bf504be7e922a0cbfc86180a94fd. 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/KRF152000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dba4adce3082940ad38c3ac21e355fc3b6e33f6a0b84ffa3878fce636ccd3b. 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/KRF152000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a976e72da26eb53f0db8571591b28e5549bb15e3ec826ff8c74b0a8480946d2. 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/KRF152000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e1d06a77698d088e805dbc0dba84eab23ce7cfddab7b119f41733c7a5ac6f3. 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/KRF152000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf069cc5c7f2b033675a56115ab5f486a394dcebb540855de41d5e47e4e6ffafa. 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/KRF152000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5037ab9d489fcab78511720f6610cad35bf4d985bae275a6d30b5d134f2d8c. 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/KRF152000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb69af6a40af5d23a658559d73092d52e013d9783abbe95def0908b90d720cf. 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/KRF152000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa4a0478387bc63f2517ca120891fea2bf114ff50ca1a78c853928b6d41c393. 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/KRF152000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9479d4a8876a2c6ac7c9c5351565a583cf09820790150c0e7a26c1fd8422a207. 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/KRF152000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99add146c898debdf166c76d357d496b6dc42f2b3cfed3401df1e8298d23e63f. 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/KRF152000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bb38c2a65a096ac4be644f9b6b20a464c7df13c7be99dff36db3297469ad7d. 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/KRF152000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d80d8b5b2473778cbc754016710198fdd505624ae5d9a1ae7409315fbf1956c. 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/KRF152000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03003133012ec3a92ae950e5995c8b08c15e84e4cf1850e752591039a8f50f2e. 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/KRF152000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5739d4a98788cb7cf9a4172a419f1ed37535c76895e46665991e53d9fd6a68. 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/KRF152000079.
Closer (Feat. Catch24) (Prod. Cha Cha Malone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81008be080e016f32f9b6916372df614de66f8e15cdb892f778780cfc42fcc1b. 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/KRF152200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44470064bb050b65c7efa7b70674eca648b43e46d58b9125ca1baf02fc2ee359. 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/KRF151900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b6020d25da9110d7fc01c85331b27bb83cf97f04fd2c869b7750a754ab4ecb. 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/KRF151900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89b8c1b9b55a53194c5da59b4b5a521b3ebdf6f3ed2bc5376a4546e52af147. 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/KRF151900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b663c372d89e59e73367669b0681997adac63f6bbf814176ac456066b9808f3. 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/KRF151900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cabf7803b4bcf21776dfb2e0449f49ea33082e1ac7adb4d992cbc1af9445e0. 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/USLD91720986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49e65fdc19c1eaf1e5ad1635d56a5fef3750164d943d12eb2198c845ba0b9dc. 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/KRNAR1707412.