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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13fd054a95b89bffccad9a0a6642b9ea0fc4b2d4765c5f58176ea8ff68a5437. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b662c5eb-f42b-4b1f-9823-e3d39efb265e.json and https://artists.proofprofile.net/proofs/artist/b662c5eb-f42b-4b1f-9823-e3d39efb265e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3c5e1960dad815b9d5d48e6ed2357b4704fd9a1253ea8678115865dc369f85. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:45:53Z), 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/ESA012490289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f995b3ed9218a535c60b4b8bfb2841b7a0c58dcfb63845903ae0631cf7b3acd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA012490290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59162abc17c673c0ada5f6f6d219be069c49fd2d1a457e2e47892acf1162e29d. 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/ESA012490291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b3a7b701d8fc7c5e7f304ba1c4bfe668a32545e13134cb9705c4083302218. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA012490292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6d78319aafe326549fd0c528e8973b26c480ec2a94c0df3ec0aef58ba5436. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ESA012490293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698712135a8594f2b5684b7471e886a015a5b7f8256027291c274f2c16a377e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ESA012490294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62ca4acf3262c98833bde0b0d1c78904f605cf150226f1ef9496de8b82c2633. 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/ESA012490295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ed94dc848f75d78209e594fb5f79a2a34f51bc75fa231048b0f926393454fe. 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/ESA012490296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f25e3af15e0f0d47cae430fe958e022a96d871fe3bebf1cfb9c683aee8aa2b. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ESA012490297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c41df7554dbdfb896898c825bbae0f847616e379141ca889d31588b8f54a6b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012490298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7298fdc3ff490730e14da88625de909158d6af88ebcadbbf4508595769895de. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:39Z), 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/ESA012501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078c0a2ed97232485ad2b72d5afe646abcbe31f56071e5c5f62ba5647ed89883. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ESA012501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d2d0d17bbb7f6c660f26f6c81b776e6be1f93723d5a06c4413e5962f13fde. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ESA012501107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63074a0405457eee9f478fed1c2e0ea4c539a55900ddaa2c94c410309ce80d3b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ESA012501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969c0c683355ee9afc14811e5fa7ad40cc92f8a3a826f7eb3e68253329819a0e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ESA012501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe25f65851a267c74c6f7e2267ee64e88aecf7647e6b72aedcf0d26cdca6af9. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ESA012501110.