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 0x3972099c9d3781e3931e7bb57966b82c6b7d8c9b984da58f5e8cc053bf8d5428. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cc280e8-a007-4aef-9008-e12d166f1304.json and https://artists.proofprofile.net/proofs/artist/0cc280e8-a007-4aef-9008-e12d166f1304.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 0x565f9d3ce2dc58d1300d1e45d6472d2171123a93394104dc44de722176cacef6. 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/RUA3R1918916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581427e71336e5927b57a15b296feaca011509f3ec6a448b86b5c999d9e52c2b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2180323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9338f3da3ec9e9b3839c9dd627b81b7a2c766006bad94e491afbd71a7e63aa7e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBKQU2180325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3386fc96b12f68aef5cdf69b43c7c91bc417baca09b7a0b62be8fe446ba154a1. 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/QZMHN2037096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2b9248cab5f2abad8f313619dc69eeb72d8a317849acad575397d3c394cc2. 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/RUA1D2343475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94baa31b3661b4723dfb2e66b6c211c960db05fcec4a4a18fe2562e39f26671a. 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/GB8KE2300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c1c071856c7d09c28de518252e0aaf81da406ec5a3da0d1dc9d82a3b7486e. 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/CA5KR0041427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301abf019e85ae559da6cd390bc7339b1a435e27808824defcafb8106b5091b. 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/FRS182123261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45bcb122c3ca976874d20bcd7b50dc2ecd42ba64f3b3207b7544bb5a98f5557. 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/FRX872162914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5ef506e36645c473870c92982a1c5624c519a2d403352836f04d1d9d191f43. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX872162915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31afe5818eb4a376493d3e115734733ac50ac4670b618420b262c1904732c1a7. 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/FRX762052146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0e54424c27b94556f95c9337c3081463ca7f0eec7b334d795d20f11ba1960. 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/AEA0D1972157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd804dd98566c6a490a31361cbfeaddc710688ef2c23dddfaf5eaabf56e61e1. 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/GBKQU1985549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565764bb8eebd5576c252a5f49c24a393220774923e61c1139c5a2bf8a555d08. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKQU1985550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20af800f042a9443456c0166a52805a0ef3a2a701f83ed6ac1f44283d21f31cd. 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/GBKQU1985559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238210c8ea5bba76ecdadd8e549723ba3e0d9fa27f9ba44995a3e4148506a8d7. 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/FR26V2080982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b1f0eee9e32e4a795365249550608671c28aed26c0d8e0130f73a3cfd392d. 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/FRX762079654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31afe5818eb4a376493d3e115734733ac50ac4670b618420b262c1904732c1a7. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRX762052146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1938375e4440c8621203e3c4dfa113e408e1cddc23762606a8906587e2538e5. 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/FR26V2080984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d4acdf2ede084a1df52d65dd0de753a33d12c8b97ac06cfad3348fa44753c. 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/FR26V2080986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53879bc80b17345590e07e3a4b9a75953a61a6e8852dff0e6302cfa95352a4d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR26V2080987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66077443a8af9b2dd787cc4e28c5324047956584e70092ddf2ba69c02aeed31. 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/GB4R71800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791636eaf343a98b50d0d6aeba8225d9b4cae28c594742bab42c33d686b55158. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBKQU2075199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435532da372f7c6a55d0285048a6f0cf643d2c356d6abd1bd7354b1366c3a50. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/GBKQU2075200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1372e51ace2c1d67ad72172cb58b9bbbf3c12c7303465a9bef2432d0efeb882. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAGR2244812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb4ed4cc7c92008c5c501d57e07c532c91056bdd27307ee1b6896e6a79db5c4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/RUA1D2348414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a50f1d1fe039df3973b48c7c250a384b719f465f5063c94e19d1ab03172039. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/RUAEX2217334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8daedae3bf19637b132cba8965a32940d83d71984b98576e0ba47831ceee7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR2320568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ea8178e6b9344da4fd8f307a60c7ea5bf527aa5b239d381a74495c20c118a1. 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/RUAGT2584759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c6c030ba9fa49918b34d23cd0ffa4888fa067d88e05dc4e41364b493b3a094. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/RUAGT2584760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da0a0d04a80f6aaab59dedcef561879c00321b7f5d1c1d5522b39a605deb65e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/RUA1D2511813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91ee7297f60d1372c77ec96fb2a02c4753ba82b88e6c86383f0b34d934d582b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DGA0T2408585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce1c72a63bda31d5247a78ef9084b456502c9ed3d9685a36c17522b2d11f550. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QMDA72523284.