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 0xd455adbcf7631e75faaec404f79b000a92b8ec15212ca26941e10b4c30d27408. 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/11e9d13f-9a3d-4894-b0e6-15d046fb0321.json and https://artists.proofprofile.net/proofs/artist/11e9d13f-9a3d-4894-b0e6-15d046fb0321.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 0xe7e9efc1416c1fdf11571c3a1c14db4d2730ffccd7700fd4bb64b7cfab73f159. 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/SE5SK2303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dcfb682a7725de061f0f6a9e4c68d853a90de71c9edca2f7fe18cce0187da3. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/SE5SK2302801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02f897889e333350e1a0c3c66daaf92725a62307283300cea0ed56f2f5b6d4. 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/SE5SK2302201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792a483583fe96cb13a3368d81c916ef52dfc9c22b637cecb67248cef1b46d71. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/SE5SK2301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695a618dc608c34ec252d4da0c5db8f58bb93d881883ad07245f583b5bece4a. 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/SE5SK2300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b044ae849cefda97bbc6931bf9fa8590c6ffe5dfc790e74a39a110a846f546f. 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/SE5SK2106301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6c93895e1bc2e6856f4b8f27e6fc393de7992186f2f2663b7d24d35ee4e64. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5SK2104701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a338b42f082dd543474d6b7323f645ab38d53b3b23b60b7af23cf2a0509441b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5SK2100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056fcde5a90dbf6bbba0b83b1186ee91979778229a8d04f098903d86fe470de. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE5SK2006201.
Close to Being In Love - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8aee07f96ca1649c18f85a9eef075a4f82d50a0fcb05b09415294056d7161c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEYOK2038010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c33ce6688713cc1f3537d7d2696ef8da235abc842ebd3b595a801f132414223. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5SK1909201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf201011a11226287a939d148391c95817c707f1e2fa013c60db9db11d9890364. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5SK1907801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbeecffa16e8bb6dffffb82ed4e6a7e74e57e6f4107296af18036ccc01195fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5SK1903401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705a4b7151e37286276f86c8c80ab8dde635c3dfaa04493259205986c375ab6f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5SK1901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19c3786929b0ed72f6fa60a42a89753340ca6660dcb73b559031321f970fca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5SK1901201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f6aab6c17a1b44d377f3341e5dc084842ec72305dcf743116cc8681e29eba6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5SK1704201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53453f0279e3421ffba5fc9f2cb311fedc1a0133a8f5bf360e04c5d17ab637e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5SK1702601.