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 0x35c9154c9c6d470765689b17724f6e5ebaf38323bb2e0c490e5f084553ba8ade. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4cd0780-fee4-450e-b5a1-19089df71cb8.json and https://artists.proofprofile.net/proofs/artist/e4cd0780-fee4-450e-b5a1-19089df71cb8.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 0xc37f7b6620f3085aed422e9b3a2ac74c38912953ad68b2f010fd7b04fb7cb47d. 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/TCACI1532957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0637cf5d79b4974eba8844334aa7133b3365d6cb373e792986182fec089ef792. 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/TCACI1532962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c93e3aedfa95ccecbd0d5a3a3c7f6b76da1074431d84c33b077a8e255858c1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCACX1717940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d75a3e9646740f5587124fab8b84032be9f2d7fa6e8839b7f3e722fbe4ffdc0. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCACW1771373.
Pt. 2 (Smash Bros. Melee) [feat. Southpxw]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4e0e8e18a415192cdee0da1c6d26e65435fb7cd8f9810592cdf23e42e4c426. 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/TCACX1761602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fcf63227503cbad95c1309b165d3d0ef7ea7b45433e3365efc3180120522a7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCADI1707957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f92089f8f5938295a7e14d2db03cd76913fa7d83e31abd3c056d542b40c6d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAGG2240312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f9eabe58bd4d9d768c6d746feb97120587b5b74cdbfb45de832ecf1de11f09. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAEI1937351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4715bda6818d93d0e905b3f6ee7fc8755352f21ae9a10fc7f5efa774e878ed03. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEP1904130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb5c8fb38750ed71862b34ea9c5ea862e531da2f02b153e596ccc6439b0ccdb. 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/TCAFF2034994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a478c433742436468ae213f8c6c02f95ffd4c404473dbf88e19488eec0f46. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZFZ42136387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274cddaba6e7d28f97a2ffb188f7e42578331e892a061e9735e2ea62ab28e9e7. 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/TCAHA2335347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3314caa9009d28200d967324e721eceb11187426d34cba7465e05f77b6533679. 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/TCAHJ2357379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5666a74274350b316c15aa32964323b57bee34f9f4893e7b4ea82b07cebb97c6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAGX2386517.