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 0x24c4a0e1d5a113f05c283c99c422982848bca91bf9fddd652139d846bbfc917c. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d02446f-70e9-455c-9a47-ba12f7927d8e.json and https://artists.proofprofile.net/proofs/artist/7d02446f-70e9-455c-9a47-ba12f7927d8e.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 0xb97120d2ed67223520195bb45ea1c35b16e0c8f7d915bf062360f66880a393c8. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAJM2544246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271b5f31faa5b861f729f64ddef1c1b24e95acff2378b80087251d87482961f2. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAJM2544251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa783207884e76462d6bd3535c85bafc9b7724540ffbbe905c508b43cc9096136. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAJM2544256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec0e781d051418cb6031cdca73525c4174e37be063918fee0d45aaa4db1f1f. 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/TCAJM2544258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43b633ff8fdc79f9afb3f7621dcdd450b8626c8d24a92116c797ab7a254922. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJP2510782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c64c6c301dcb80048e9ed77da54a5ec0adcbc001105c336ca61f78db78e2a3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAJO2510791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cf22285999ab8c280a248322103a0a0be2b8638b6bca1f8473cf9f7ef8677c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAJR2581560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d583194d0a49123195613b06c00b48dfba1fb25a38aee67d6cae4732194cc. 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/TCAJR2581564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba54e28691b392916fd4c9f0331b7a3af1ed43e2aab31c18ef769739e57a0738. 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/TCAJS2581569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2720d166b773051b02631f8a9bb4cc8cf43183376f247f748aa4486841b4f5. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/TCAJS2581574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b82bdec2ae1bd41155b5e74832a0f584eed9d7f9efee5c78ceaa7c768398eb2. 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/TCAJR2581577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a835f65a4287e7adda33e9012d11082fb8ee13c4a4cf205fa905b942ef6a1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJR2581578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1064e1e8885b4ce023c1d9c07f2b8e70d32b4241b90334a8f07f6b870da6953c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJR2581582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9cd43da8212d3b8cffaa416a69133e1abd6aa3973cbbea2af0aaba33983a0c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJS2581379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553d603f769edad0940bfde03d41440f99d4253fe7ab638170cecd3f581a4d8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJR2581388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef19e4f725e1080ef6c8a069ce3ad25c717e1cf8dbb5e852fe88062888b3c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJR2581393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625067aef999182e0d49c166a3778086721762a1cb4b3911fed259fb4e5013e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJS2581401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b613a862dc16243edfa99c48e59c22374f9b36067854597596a215ec3f6c26. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJS2581405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400a393caeabf02ebc44a8ea272975500fbb7c11c71de9fa56063741a0850236. 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/TCAJR2581417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d36ef08294b045c0c58f2dc52f0e0ef13aa7800131cce84df3b92f6c1c7656. 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/TCAJS2581421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2608a33339571d97d9ef8a659ad76c46f1dca35e8cf2a4c08e73a3a318538. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJS2581430.