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 0xde9bcfa9ea1f820ab6eb0a1fc44f0b8d114bb5565e58c4596b40b129dd0c86d4. 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/607e2640-5066-4dfa-88c0-45d3ab904939.json and https://artists.proofprofile.net/proofs/artist/607e2640-5066-4dfa-88c0-45d3ab904939.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 0xd702703fdd1d155e859d710197cca456d919e18ba069762c173f34ae47f12210. 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/DGA052482294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaae5525716830b1e83ca84904f5affac3247d96162cdac4b6d7c77a9975203f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL1ZN2402875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f8bd00321eefa7fe4e1b60b41d3a423670f006c6bf651587a7fe3b389c83c8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB8KE2407822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e68f8fd7539cdb2ec3a673b4b382e7f1c7c5d8df678dffa00978722a8e4cd0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB8KE2405666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975328f8fb67f7b759d8f273bb01ebaf05afad070dfbd3967ec9020e657609c1. 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/GB8KE2329343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713d9b12eb59ac112d4385d2e00b3f3736049350f0e28ad97e80f0705f586c3. 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/GB8KE2326535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58884494b4c4010275d1e05f315aa976f3c371b52f45f7653511e447116137fd. 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/GB8KE2325478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270a7fe0db0246f0206ed2a32ffd288c9ef03c5f415c2b0e6b5cfe984470bd80. 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/GB8KE2320851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86c56065b31090852d774c253fd68e26d1f032e1f0a13c7d0893f4c1700b67d. 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/GB8KE2312414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6369f8fd53045890a205db6b19db34f7d2c26e5045797464f73d2e44dcc0e109. 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/GB8KE2310195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754f418ff147e9610820b62b2c272ae36eab3f68cbd09024ddc2c271acb09582. 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/GB8KE2305210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255f702c2a8c6973e6c5d4aa8ceaeee7197d159c1481433da39d492dcfed553b. 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/GB8KE2305207.
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 0x7b5853700d3625f6c14445c5ced78e8d0832e7905730728100a9d1f463369ea9. 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/GB8KE2305208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f60aa281539fbad84f6c6d377573e97e38b430d6d4b347169e28b5f6d087085. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8KE2305209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b14f9dffb7818ded67149566d26c65de4a1fcaae780c8313b9f81232b885217. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GB8KE2215378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffe8f9afb01068654027604819550682ec3563e1c80ea2c982a7c300b1366f7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB8KE2215379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4d0a20a4f3822c122868131539f7c189833a450d3e48534ff54c301d6d716c. 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/GB8KE2211282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde437a07f6fe62996dac7fec724ac7f657d32e12e307c21500c9f1e0614da8a1. 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/GB8KE2204105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b87f5b9db2aad8cf17d48840cf7237f91d84681c15896d752bc6c7f8dfe60a9. 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/GB8KE2204106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbab9105af6c6c9076c2f2c2bb244d84f718575066a0d821ba902ed71ca74b3. 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/FRX452143889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cd979aa4d0bdbb88e8c1fb5f88a51870164221a00172d6f0dff8d89496342c. 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/GB8KE2153692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7765977b4ad6c87022bf7f9cc1c54e3ff85ae560403f9294e02acbaea6682a22. 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/FR96X2158038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e161adf65014f79c27b4a66b92151829d0891a7b7d21fdc50f702e371139759. 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/GB8KE2159486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf73ae939f67d65968f64b9740d51067b49b1113a97740e355ed3e25bc0e9be. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GB8KE2159485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a4a4e14325d9c985f5438cad268abc20c8c27f0dde65564467f3a967903ecb. 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/GB8KE2055522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221a4228ea31f649e3dbbfafebf99e39ba14d98ae98969586636c18a632c2d07. 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/FRX282067765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d0af6bef773bdb68ed46635359883d8f519f06a9af1201e06e4f7dec1c13b2. 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/FRX872194795.