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 0x7e9de5965abbaf2508934040af6ece5b821c055186ae1c1987b43c325c3a4ce4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cf148bf-4559-4236-b991-9eeedb4dd740.json and https://artists.proofprofile.net/proofs/artist/6cf148bf-4559-4236-b991-9eeedb4dd740.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 0x11a37a78cad363aafb166fc252504cdb35d300077ffa576b08a6ee8646826ec0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE2407546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4899a4dfdd2420d5c8103327eb40231058b96a1f235eda218a80c95eae168834. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770d1f6fcc378eaf6bb000e49b66cc602ce057e5080fd9801c68778c05bb5612. 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/US39N2312037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0862d127ccbd254770abd595b62da9ce66811906aa7753e19efd62f99ae8ea4f. 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/FRX762287207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92790f1b561321f04fb98ff8b11f4403415b9bb647deacd01ed46f8f3f0bfb2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX762287209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7e2079c8000f536299b7c71a0234fda46b9b63adf58f1dccb44ee6ec2d701. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLQ22180442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d73f53ef7d980f87e9ee0d0bb14adb7569c944ebb3a164b0a2e3ed217f198f. 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/FR96X2256778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a7b3d88a71554730be0211e2128093b04389a8711056011314e53d9d8c882. 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/FR96X2256779.
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 0xb44f9b9bd85892ad044342eb11fcf3a86b288dfb403dea738a85a907871df7ab. 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/GB8KE2202181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e78f7cc9a5835c0e4b30b3b2174ba1afb453ae2af2359ebd9b6758a1e1c34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2274588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e40f9789880be780e8db8bae579d30ef53dc647f077ebfa842dc24ea448db4b. 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/FR10S2274589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d60497239bb8fe626d4148eb9c5b323bb0b9d363a102908adccee7e82185d32. 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/GB8KE2154812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88dd112310a94697b76cca60b4a02e1b513020354aee0ba26363f25bf1bb38e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR59R2134843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8d2c05e92c250eaf226939f85ec996341557529d006c37dcbbc96979d16a05. 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/FR59R2134844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029445cfb1c71841202f2be9aa3bce2850611389ba9e5ffb5d9ea0945a5e20e7. 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/FR59R2134845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae431d0cded2a3886507c06335d918f13529809a395574f0c0a24c37a27bd0f8. 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/FR59R2134846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9261fcb06dabd38e473786aeef51a508b1371fb4f2db7ef6711f68c6697e2161. 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/GBLFP1940984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0161c8426d62b1f3e4cb87deeb2b77b41b94a3812b5215190760fa34a44f5893. 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/UKDNY1900633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86174686cc6bc9736af185b3a840b5461aa24b2b5278f5cd97d64b39e5198fce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZBRF1812735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036bb4c2d1b2a2e2d0cde3d48ca74145db584cb745e5c556b3d7db5799993e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM2PV1718005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb944de46eedd24543890024f525610aabd2713fd29e3af6f92ba56d71aaba. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/FRS182123259.