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 0x5571d44e4cfdb5b0f6ac10823d4065ef6cd52db8e37c02c35908910607c2d5e8. 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/7fe2534f-3647-41a5-9005-a37d753467b9.json and https://artists.proofprofile.net/proofs/artist/7fe2534f-3647-41a5-9005-a37d753467b9.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 0xa7702900a67f226542c3badf049bba9119695774b03f5e3e547c900dd7330516. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ATN261032801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb12cf164986884caeacbd46fb2c835ffd7cacc6e2d643fe5ebeb41497f7035. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ATN261032802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13c7e3ab55b784ad878f8849cb2c8c4580afeaa94acb8dd422e0caa4a3edb7e. 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/ATN261032803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c45d48f76ac97be926a2a76ef9104f51569085eaf8a8098daf85d0d826e669. 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/ATN261032804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8939b05ee0123293133c6f1dce42d83696aeeeb00d18f62b8587b159cd317f1c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATN261032805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9a0b7b20632d45a2e43486542dda09bd8e47c3f8b88bbfd554c6e7454c4e04. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/ATN261032806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7222a2ea6ab97102109504a9b14bddc0a74564db6dd52d6459d71495bebfe38. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ATN261032809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcf26e17aea7193585491b66f6cb4930059a39701dd334cf21fa8d8648d2a34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATN261556701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8be6918edd0cf646b280fd0c20fb78840001c82a9e101a54a10bd4d19c326b. 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/ATN261556707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad1fa4cdf1f1812f971bd5ee8cf108929266f794f24dfcd21c20f27eb8290e. 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/ATN262195302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1eb5d990505f763a598977feb204b918bae0803b233643e3a7740bd1199a5d. 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/ATN262195304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696f972bd04e14322dcd917b8a8b7988d448ad50da1cad30ddac6fcc03024f33. 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/ATN262195305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd514168ab981a04fa2809dc4f5a20587f81812645c7b382c79e2634677ac6833. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ATN262195308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a4a87d99d124c6f03e0f26b558e0e6b21ae479c0d735ef923e3cf2cdf4ab46. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/ATN262220501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e981fec2788aba3b82961751f7121d33f4917f7654bc6c3a3bfff4db4b8ab93. 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/ATN262220502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7886c702ee3d0b54758e99a3408794d3b0045b31e90d15c4baaeb2db6867a33. 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/ATN262220503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bad1da543259c54225264a81e63e2a4fd340131a7021586afc39250c2fc4f0f. 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/ATN262220504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4629fe91da71861f02cecc5828cae20641e2163eb6c4fd9fc171b9478c02ec33. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ATN262220507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab5e60ba76e41ee57edc94e760b205de9329ad240a01d0a121f3601551be536. 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/ATN262220508.