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 0x58cc697eff76e6b3910b62a7062048aaf4316cc7374b3b7437e1af351ba4a584. 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/d2ec95f1-b6da-4341-9810-5886ea668420.json and https://artists.proofprofile.net/proofs/artist/d2ec95f1-b6da-4341-9810-5886ea668420.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 0xbf7b079bc693a3b03fd790e4158a0f4886a8fcab1999424c9aa57d05f53d7493. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HUA221000635.
Sizzlin' - Candyman da Marquis Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813679060f59ba275161702473fd08f4c09c6f82356aea95c5e6d386e2d1d8e8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/HUA221000672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41189d9500644a4012fec7eebe8318e834dfe9ea42aaf31f74ee9a637c237dee. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HUA221000674.
Sizzlin' - Chriss Ronson Redirection Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc540a60a4d673389f234388c3a01b3cf08a052b5d908f896c697795a3f8d2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HUA221000675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bda1a0b3b93ad680cca327bde4f54067516300487f0b1258d7df88e0b55b732. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HUA221000676.
Sizzlin' - Hamvai PG, Max Tailor and Roberto Winny Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ae79dc5baebae3c67469724f76cddc1b2032038f7cf6006b111e4d77026b3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HUA221000699.
Sizzlin' - Hamvai PG, Max Tailor and Roberto Winny Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b875e80bf22d313113bdbd3b991260f8a737b79a009f45973f71363f88783a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA221000698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c25783fcdb680824e49fdae4994bfb13cd31ebaabd0723369957caa6c65924. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HUA221000677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecdc83cbd75cf65a515bbb12111b6edf20733d9e670db0c1163a68d9c4ceecc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA221000678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1348190bcd734bf5b829f585b846291f4efab7acfa77fdf24d29082d8c90797. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/HUA221000634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf38ec4151b13943c1d3413d49be8a6c156962b22b3f76dc81b3e8c8772135d3. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/HUC251500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab26ef369b2143e420e920e9b559cac3388006fe24fb8f1d67ec2eb2bf0441d3. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/HUC351500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4c738ff9f0cc4aca609a82ae667f06480ce13a302d7c0fbc23c0a98d63ebcb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/HUA221300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9beca04462c4e392c14bfba07f4a31f79023883cd3bf5a3c7439296c46b686. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/HUC351500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb912a16f47587978f77efc718476a739c262437fc5b696264ee85e99dcaabcee. 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/HUC351500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae767b643222b50a0b5ceeb2cb448eb81d846180ff2270d7b2d2d3dad4ad542. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HUC351500034.