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 0xd942f9eb935ddd918ece951c9b6b895016838bf50d08fff0dbe70da1c4191095. 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/a590c908-9472-4ad7-99b3-7d6b5f6899f4.json and https://artists.proofprofile.net/proofs/artist/a590c908-9472-4ad7-99b3-7d6b5f6899f4.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 0xde9ce127ee6210ccaa688bfe3bf617208e5c6c401e4dc590bbed62cc90781302. 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/SE6TI2155990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4514287f87083164de42feec7077bacae3cc050ff25b99170b7317a054906f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6TI2156011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cd59610439be1601e9d2c0a22bcb499ae83ecb83f62a3d59e995777ed2604c. 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/SE6TI2156007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f5d0b8c3867e4c21377ec1110c670c7ce11f67d695975fbd84b12abbb7d62. 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/SE6TI2155981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37294bd30c1a55d6efc1aa490b5751da7bbafecb3c44a355356e3a7c35e8955. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6TI2155982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bab3145a563b43c15e4ead119a3edc6b3f624f0f805db7e26d616be6317252. 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/SE6TI2155984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1298efacfc78444563cb437d2575a125704723c39efd127dae5dfc4e6df3b30. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6TI2155986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbc57964dc91910a4f48236de03da88c8c91a7d6889a9599e0a2bc8e7c7f92. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/SE62M2290138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa437e01d8bf9ae17d6bbcd2cc2a982e07c86af4b926dcd888d29679ff7515ba9. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/SE66N2250798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda281f3f1f3c6dfd10991d85900c9e73220a353b2da618f51b86641595cb9d0b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMDA72340164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b806cabb0e793e854b5fbc8bca26c524093a82bbba5902bf9677f8087a265e2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZNJZ2422120.
Con una Lagrima en la Garganta / No Volveré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d6c5eeb101ed38ead2a382c3d0e529daf8362e78fb3f46a6a8c293348e2fd. 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/QZNJZ2583875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa05f4a4969e0a6bce4923025fcadd6c00171c826945b5c262eff27446c4982. 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/QZNJZ2583876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e749ae007fe886f6dd9925996877afedce072a446c578db355e26a5999d6375. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2583877.