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 0x20342402feedd2fbbbf0ef878d55dc8bc74ae030b9bdd35bea38818867b0d2ec. 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/e1f133c8-5770-4d19-9dc6-204c380466b0.json and https://artists.proofprofile.net/proofs/artist/e1f133c8-5770-4d19-9dc6-204c380466b0.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 0xddb7090a5991435978d1b868c9adb9df051ff14c876cac373734c63aa4d401fd. 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/NZAM02223801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0373eb7224d388fef7c09ca1e5912dcc8a2245597e2d4535cbc31dd6c8b92523. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NZAM02223802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cefe93594b48ea78ec64077a70d219af475b296da8dd938c8f0e66d5d361778. 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/NZAM02223803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d385e417f9238f8b6363de85489c7ced27240cb91bf783e68ef8d984048cb. 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/NZAM02223804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b69ef86540102ecb913762205c7b5c19cbaaa87ace3dd35b3ca10715ce3bc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NZAM02223805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e24ddd24c388afd4ecc4e6df6cfbe31548d08f027387ddf44b7b8302e617eef. 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/NZAM02223091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401b555672c09674ec9efa770a02b718d5b8d121dec548c791e26f39dab0bce6. 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/NZAM02223806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5314cdc7009d71032214b7eccde87603023a1448b623e13da2831d5ca6cbc5. 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/NZAM02223807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad59174ccbb71cf79cea982b63c43d405775974f0a0ef4a35e68e5197f770052. 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/NZAM02223808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aee097cc3876780bd72d1072e05594141c827627a3f926ea714c74d990c017. 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/NZAM02223431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb736c24ed76fe2a4189a7b603a81cdbcee96909d231c80d88c2fa92f68d4c. 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/NZAM02223809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bc53605d439da109758fadb3b07cd127e0db3146911e7123683e92efa51a32. 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/NZAM02223810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396bc77cb4f5120631252312549a47986c96251e1f6e1d1cd7b86f02e5e0c3cd. 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/NZAM02223811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e21faa800cd7362d0a0392d8001699fed12b15e94032f99cca5f740eb7967. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NZAM02222253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e55bbc304b229c13ec41a38f7f73c41289b4c1f874e762a165988ab6e4b135. 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/NZAM02222254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81f503d89817872c77d8be3449007db1c24339d2b6cf06706747aeed465acdf. 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/NZAM02222250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93147d5a88f4e66db7b675f7fc2119404f2b552bac3038872685f0f65615e648. 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/NZAM02200908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c2f32e7ced8f86c05771e79796afb6cf3865eadfa822b98d28deda926b19fd. 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/NZAM02201602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a53c32cf108f083c5cff243898053baac96ac320fbf1776e9116b043c09ff6e. 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/NZAM02222257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532880405017430ac6c0e47b6d3f17852f9cf4b51031999637f90d32a0181d9f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NZAM02222258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169457398577fc4f26af6a124b36d8799828b75924564f914224d99945379c2. 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/NZAM02201895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9096309f697543aeba5d3d60bd24ea12736e3d2704049916a528ab1d3870e09f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NZAM02222251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8325e2568b6f7842cd72361931b3a6f2e6feda301d067f605c93b11254edad0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NZAM02222252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f3c2d9eea4130bc4964b0cdb859ed39bbb840749a594ec7e737c99378fa0f. 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/NZPB12501581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0735c7c978c58ebee27fe920b3714e9fe61dc807a32a36e57383dbe5011ca484. 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/NZPB12402929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c4fa09d4c686d53e13dde241f351c9e68ca54cfd56818fef1fcca4b3eaa4c5. 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/QZHNB2220129.