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 0x19c4d0d5e07b6e842714fe3e2852ffb7c25a6843c944d20a9811ee713373675b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04f881c8-475c-4249-b8c8-6fdafe09534f.json and https://artists.proofprofile.net/proofs/artist/04f881c8-475c-4249-b8c8-6fdafe09534f.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 0xcd499945f477ebc0fbec47eb866865d534e1eb83ccd5d28c42ffb9554f2bb95c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQZB1413105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a6b4a257800d0aa29ad55c9c3fc1ab82e567513742f9396728f42e524321d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQZB1413109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ab0274d3aabe64cbbdf80127ef5de26aea1b12c16c735c5c603d5794b5a33d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USQZB1413101.
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 0x3ce8e6c2f1254341f1ba582f8dc0bcd38921520e164e0c08b6f46226bd9845f7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USQZB1413102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2969ac3fae35148ff8427cc1d72cd55a4df628d1583c15f2907aba61dbd3bf9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USQZB1413103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf799e7a0daaf7d66a6bab0a6baaa2ed2d943a6c1cdb019c3618cd4071c8b8336. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USQZB1413104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee63c46f866dd83df2d6c5b2fbb752b713936ff08accabd9ff656ab5dbecddf. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USQZB1413106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83e88d98bddc5a5b4c29b9a08b5ba1fcb4e971cae46d285bf2ea13fd896665. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USQZB1413107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeea12bd239132910a4144a9f79bbd9b3a2eef2a573535e7cfa13938f41fe43. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USQZB1413108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e362f8d35b643fc3307d8ac25ff42460c0259a0504dab1f1a4de1ef1a433322. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4KC1096701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee414b4224e9652d2e18bd85f2c1fc73b1ce300d95b24bd60a2568cc37e1da1a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US4KC1096702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe38e6244761859a3326b2fc743a8b0f55fedf352cc951cec069d6c5e8e1d2c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4KC1096704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693c3552383f29c2dbd8bf9343175f7eae48c4e572c65d7ed6dbc1541afdd41c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US4KC1096708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41333b363d02593871cd7908383041437541ec3b105cd1d6fdb6da046d34b7. 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/US4KC1096709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde845cf279297079d74c7f342ee4234cbd94b359ec2527a79c1ba0d06b328dc8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US4KC1096703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1677536c184d487bd364cf115bad9c6b4eefb66a428933e4f6f88c58b3a85168. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US4KC1096705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b93fec21305559927dc95117e78367dac8e340371754225d73fc95ae32a5ad4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US4KC1096706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b08305db4087d265f849e6b0de44ce0a551d0372675889c8ccf02f6129e099. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US4KC1096707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf1a642265d7d9fc4528179230493f1facf4acf1632688aca825301e3d02eff. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US4KC1096710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a409088320b406d0e184850038c41acc9c72d58ef1e191d363dcebe15252753. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQZB0807405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a08523ae374002cb5439baca11c133e5b473ab1d179d2864c3618eedd1272e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQZB0807406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef200f474ef2295494b8f307dc818ca4aae551472e9263453b240c845e262c38. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQZB0807407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b325a8829feff678d93b91c21265ff18f43d55cf756ff7e7176190f9ebddddd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQZB0807408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373b04593fd3d26ba3216ad2b35de4affbb606318d58113852016edc7cae8e4b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQZB0807410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cee2ce433308e727961035f049bf7f981c98f78e2fc32f4aa345405fe614f7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USQZB0807401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93efc1921b1796ef08c8d7364c13cee0a5399202ea89f00897e4f099ce081747. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USQZB0807402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b974dee5b880116e03c0d02aa3487f8d10f4f35f43a45997734461e262341. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USQZB0807403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4266a6fa6e588eaa6eba3e1fa1364fbec91689a30ea9808d9fd556b5b72e16. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USQZB0807404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a90d4ddaf9e853a03d9d94d76dba7f9b1bc2041037961f16f3f2067d52a18d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USQZB0807409.