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 0x695b430b844b5351fa4c330de04d379dffb8f4696bdc924b210fcaaed205a7bd. 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/2d346bb9-76db-4b26-ae5c-4f1a93364076.json and https://artists.proofprofile.net/proofs/artist/2d346bb9-76db-4b26-ae5c-4f1a93364076.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 0x99e5101dcf2a338057154ddc2a0281cf7b3374aad07f6f0b7ffe36e39084710b. 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/PLF242209692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f73ba1196175ab72cce309c93d0e39653077899d48f891d81710760953ec1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLF242209785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c0914229288c5968183ca348566096bdfba3c1713d2897afba06b54ab61f7c. 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/PLF242209956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e5101dcf2a338057154ddc2a0281cf7b3374aad07f6f0b7ffe36e39084710b. 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/PLF242209692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c4416de98a1dc896cc478fdbdd40d87d7c98b5d6e33658131cd154c769d2c. 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/PLF242209957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dfd9935b6a097de6586331d84161a65195d7505b47b1578d5297df77250572. 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/PLF242209958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2239cd93fa008caa3065c8afbf4f2253b6b9b68f3f54db0dabb74f867a55c0. 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/PLF242209959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f73ba1196175ab72cce309c93d0e39653077899d48f891d81710760953ec1. 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/PLF242209785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f266b7a296f8e5531803e76545fe9c6ba8f96adf1328ab6f2c9981ff8e360a4. 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/PLF242209960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0160c34dc03bd596f802839ba8321cbe990817aec411bd3f39b5490455620dc. 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/PLF242209961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25630711c8bc0a1a0a4a6e9afc9acef07f310f3f329f80281c5061a6544343d. 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/PLF242209962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2282e3efa193cc7f1542e9984b772de8f2bf62508d3e9f0aaccb1b2b8823ef. 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/PLF242209963.
Bez kagańca (feat. HVNCWOTY, Nawaj, DJ Te)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb00bda9f446985126ab53e1dde76795b7b90ac0886788968fe38fa6f1378d46. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PLF242209964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87aab42c245032e1f4da97b8b0d053913f1462114357fd853ce84028920ccd0. 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/PLF242209849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b24c68c95e923a3b31b38d02e428ae11b59c6cce51faeb7b633e8048cc8c08. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLF242211596.