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 0xf9243a74554b58f4ddc724663807e61154a4292d6d324e8b768a8c5db435b282. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c83f9f22-477a-4dc9-8a9a-dc88ce558cb4.json and https://artists.proofprofile.net/proofs/artist/c83f9f22-477a-4dc9-8a9a-dc88ce558cb4.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 0x081cff3917f88d8f018400dbe694fdaf9a80d287641328060d41d0978b51a719. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX89G2571179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76581b76cddbd1063c66d482bf235ffeb3b19b9f8196469df90c10eb669a355. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX89G2521090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd813f421cc675f2d7dfde7acaa59b82bab46bb67efdeb807b6f8eb85da9b300. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX89G2513434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d126f1969617243c5f7e80404f14100396247ef62dc25982d5dfc6b1fa8c3e8. 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/GX89G2593756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f899192eaeb3f42f8fad694a0309035d1cc79586286bfd787746bd8c9bcbb9. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX89G2502480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30865b12f389874cb98e528e1bc4ade4ca9520bc40b9549a5e4ef04e94d698b6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX89G2553181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc378c018433152326193cb57e17d5bfbb7f32b48f2d2b8e45c5601d315cc6f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8KD2584874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff8e51e540b154dd9dc7d6c41b0e55d2344e228f94780bd8f144a8fcf4c04d9. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GX8KD2541236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc34bf9fd2bb8c48960bb2d5248f0a3d2e995b2141685e235149fdf369efdd. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GX8KD2536423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabe9543f2040f5f3ac4abdb3884952990d94e123928f8facaaaa85c93398383. 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/GX8KD2559494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561c36257eca9acdda0db8d347380ac67f302995a49097d28f309725f7fd345. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX8KD2589793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e4dacc334ad91d69fd1105e92a54e3090afaf57114b74a769c9b54f18fb788. 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/GX8KD2585447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc423342c7fd471d973b61a032fef55abbccab9c2b2f7b7447b3536b3dbace5a. 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/GX8KD2539139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b3e9ec062c0d37f0f9c2711d110dd9f683c77013a62862968a2adf908cefa9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX8KD2571585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd2af79aeaef3743ff13c42fe7bfcc520aed77f437d86fa3d5aa8a1d39197a8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX8KD2506435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb847bd185267db52a2e533020889e0c3719b9aa5984465b56706cff0c367453c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX8KD2513116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0299510489e1bcde9f56c8fb371ae641a4cf46a3c1114b70055488040786f7. 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/GX8LD2514879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b619d3dffcc5e0d68f05ecf9022c9608bba15d753e1a837c96f7a22cd200942. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX8LD2511174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e512576df7fa779cdd95acbb0718adab61c4325da68b402dbb9417cfe8b8c26. 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/GX8LD2533710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa49462b9e32bcab09168649f283428059f1f84eef207558e185f9e9c79d6413. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX8LD2523866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac86327803589c957c66469a9a5f59a80f1b115bc47f4d0f24a0341f9e5fa90. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX8LD2562458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117d3f5567ab1722f65516b51b57314423b0df68f3b2c84165a91c2359ae56e0. 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/GX8LD2564474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d458cb1bc2a0dd629ba260ac4f1c7d522c5d43c3d5c56f9fcfb06a76e4f5753. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8LD2569169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94440a79a8b0a8bae7566d444d1034ce292d35dce58b30bd07506243f9caa1b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX8LD2570078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f99e60a9ec4e4e0f5484098b9a396596e880e9bda3f8119104052d503c9046. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX8LD2568766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7429ba7b0135f179b0cdba59788b6bfe52ed6b9fdd247f924285ec6c7b1535e0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GX4R52588805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c1e581d67f10a1ecb39b7a1e7a325cbd222f6871f550d9611f0df116fd5453. 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/GX4R52508882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d0638b415baf4a6cfaa4a4d94cb7e28662bd26898208c14cc2e6057d5f761. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GX4R52549938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201d1c58cded06a8ab7f5d7db39c2826055837d9e2eb852ec0b6b467c50fdfb. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GX4R52531191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc767e865f1fbb1a606f4798026c2250de63420ef24ea2cb48b5e43f6af4050. 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/GX4R52563034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca297633c3fe1a81d719f9af6a2d207b1cd1eb437d51b462a91f459215251fb. 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/GX4R52585608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0126689fc98e9b2134566e7eb55a920d8876da98ef529ee68e5b6e49784c8. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GX4R52500361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df903860235674e69724c9225be47ea20fd740a92f8db5264ac1b01f7df2c8b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX4R52580810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d406a1b191508caa6a22b921bb89f8f92acf71da15e49d21d4e2b10833abff. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GX4R52562741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dec99a9178dc745ce12f4e00df86103a36121e804dfab76782325e21c5cc0c. 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/GX4R52537853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4bdf595950c25f957e1515a9b18e61b1d1e18d75bfe3dd204d2b843bfd9256. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GX4R52535384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388be7325e94944dda5e21150a4153fa1f0222c500cbf66b26c38344b65708b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GX4R52597793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935a9664ffdc56ab2f5412daa469602a6cc2c32938662732931ec845ddb79aca. 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/GX4R52576729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322f4b2f08d9d0b25024cbf5274f586ce5437401250134adcbae9e12fda43a27. 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/GX4R52502250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d68a2473c5bdcc830eadd82a9336f6d64f52f7cdc4d180fcbba0149b0b97fd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GX4R52512761.