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 0x8083ae7c5ac38c67b10e30fc28f8c1fda6d0cb373d38da9e5116d0c0a3fb3450. 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/3ba22fc7-4f64-4334-915a-7ba16e3240c6.json and https://artists.proofprofile.net/proofs/artist/3ba22fc7-4f64-4334-915a-7ba16e3240c6.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 0x33ba049de5e6617978d2fd3d97df8a4b4097215d70ba73e99c7fba07d26cb120. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P1134458.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a1bde52d97bf54c97420a887213fb9fcfc8b8e08d2aa079ebe4aea89814bcc. 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/USA2P0502560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7d5b02e51f20dc86eb9b9494046ad7c025de465da21dcea406d17c05e8dcd4. 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/USA2P0502561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d28cb3d4f0039d2e2b68252eca7bcf12e93e6542ab00d543c85c9d8b465fd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P0502562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e86b65cce36008f9b6be47c8a3c102ffa0d11134bb7f37de44737ae986bfe5. 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/USA2P0502563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e605cf270e68e6932d4372e5bc7dd58318cc802c3b953075e1d84d38e166d5. 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/USA2P0502564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd714bebc52c9e5b8d2552c11873740457576a504b3cecf25f05a2f53945c61dc. 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/USA2P0502565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86cab256a2d8b429c88320bd6b88c3d5378059d0b78446694641a15a3336614. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USA2P0502566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a7dc1f53bc7cfca766977d22c6cbe3b35bcc971dd96e3a16c6f53c2b27c3db. 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/USA2P0502567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656a9ef50efe9c05ee511a991b15791a89b1d0f3a77ae8ae4005a65799d05ec0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA2P0502568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2ad651544a3963a1798e011e69716abdcd7c8d9c63b05e2770f7c2f54ad53b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P0502569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4b82329b800614a94cae5d399c357ee747073a367218f1b60a56419f1ee10. 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/USA2P1187098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82629ae4c904b19f5bb4c767bafb8dc51cb86aa442b7c59cd0ad03553a4bc3f3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2P0502829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538fd3d5303ab029abe8d00f3fb418b935e09e08936b248567d6d0dace77088a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USA2P1116782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f266233e15aa0ee2c518ff0d095920a02dea80274be896d33e373fec70d936. 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/FR6V82166380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6422631df26820de84c08764fd7086b8bf2794ced04d75008014620aef7bd46. 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/IL6321500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f50c39c0e107ce5cb5722439c8633acc5308c24eda4c8f48f9364002f8db8b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IL6321500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8954068ef8bdf2a490c20fed13c466acabbde41529f0b2befa5bbf6afa1c9b8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/IL6321500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758caabea8c4938efa7f370e7b93f85e11f6c8cc01755d0f1714b4b97edfc965. 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/GXBNP2402540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00bf5333d726a77177c6e21c6e37e4610859e4ddc1fa74c42e4c9c1a233010. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GXBNP2402541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3884a8e86c85193f9a9603f15286c4b17204e80af2355976f4ae8bc516aed9. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USA2P0502574.