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 0x2a1a6d4a49a6bb510109bd6784498cf698662d92d96cb9e7257f6124ce60e080. 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/a1d87abc-4ca1-47c3-a5e0-5bae6306ca0f.json and https://artists.proofprofile.net/proofs/artist/a1d87abc-4ca1-47c3-a5e0-5bae6306ca0f.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 0xfc687288523ce5a5858734e0d77dbfe5186981eb2e8fd64abb491d8af511cf82. 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/FRX282048118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972ddf42ed3d86c8189994b399ab22bd30d2f72145fb2346dfa2ab402f2936f3. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FRX282048119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdda09c8ab25558288e51e835cb5c91aaddb9b0d4907de198f5f9eecc31d236. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRX282048120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c60910fb79e8a073215b11a08107c07dec4e1c934d3a3e0e4b850d3411bca2. 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/FRX282048121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0939575d5410c3b81ffe65c6bcf16e4fa3c9d0a58385cb0313f403c1a161be41. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX282048122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36a6fb6c426b5703129b3083ab2b45a862e35b13ff7384b7f6b477d5d6d684. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FR96X1987395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0651f8b65b9e4a29e2286193ab45ffd7c80e304479ebe3965c043ed445a38717. 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/FR96X1987397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ac38ab79851661b002049e87ad69ce6f37b9fabce58b6cd5334ff86d274ba8. 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/FR96X1987398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbabda18fc722cb044719d8de747c3b9701e739a0091fcab06f3b65f84892fb8. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/FR96X1987400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ad562e487acb78a51522241792750a8683b9d632e6a445e91c2fde215965be. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR96X1987403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d249977316c378a7b6901be2596d8ce735aac8680b38b16de076a8352a0032. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/FR96X1987406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3b3588fa1d3d46e3ce0d916d84b5efc79d02f440b76b58facbb503eb16cc6b. 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/FR10S2118665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32a6b084631db802911272ec543fa49ccd1c132a725b3c9cd7e14ab0ad67a78. 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/FR10S2118666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926377b3d7a1080c572efdfcf6ef5d63eefb15b1cb217681bdb54a52de8ca4ad. 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/FRX872432101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d77082d04f3900b0a0d95588c2e95369809b7ec9fd31a414df6d61eee0db8d1. 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/FRX872432103.
You Can Be Anyone You Want (A Tribute To Sajama Cut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a2d9a0906ffaf402eddb4a54166e3992f5ac40b78f343ed521e0d2c0ffd9b1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRX872286899.