thumb|upright=1.1|Lake Idro, an Italian prealpine lake of glacial origin situated largely within the province of Brescia (Lombardy) and in part in Trentino. thumb|upright=1.1|Sunset over Lake Michigan
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 0xced34a1578a29f9aa2060a630a7e24547a88ba27261653fc4f545ed1d2fa5f72. 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/618b6156-77c8-4ede-be4e-abdf9d863baf.json and https://artists.proofprofile.net/proofs/artist/618b6156-77c8-4ede-be4e-abdf9d863baf.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 0x310b8b3f8b1b61a08e189036867247f8eea6f072a1ef881d6614a98ffccaa10e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USY280743975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53371988400790db9d01080318c9310977a635ed212f041cedf0ae88fcbdbe67. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USY280743976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f9c6bd4c7848940e7b0bdf99dfd520ca6237df4fdc951570ee0c15e8594383. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USY280743977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130dab02bee5f1dc4c67e684a7e868b63d2dc5c4e497d290ce47a15275fe8c6d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USY280743979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caf287738da78972565c7e89f718214749005a13cab7e60642f2b355e06af6a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USY280743983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce5fcb945be284154941ed97253dba3e099a35ec8f5fe23b4ab382d171ac7d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USK111122803.
“Gravel” b/w Selector Dub Narcotic “Re-Grade”
Gravel B/W Selector Dub Narcotic Re-Grade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6b6ff025a0e2f0f3120309103b1669083cdc49edf1efebdcf7e4f88edd274d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMFMF1379320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4598a0539b124c3eb9bf6ee597358aeeaffc4b5eb942c25b15eaa0eacf7893. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMFMF1379321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc525dda2451542d4d2412331694bdcb5fa726a605e8e07e03cdb296bfb25a8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMFMF1379327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e43aa180ad216023626dd1e8a4673cda73acf21fb52cbdd9e0d4fb9e354fba. 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/USK110921301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6564b6d2c1e969546c1432c1b0ddaa0afa7cd279aa24a51a458c5ed3154399. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USK110921304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbec5c84e0f26cc3806c4e08c09cd4b21b88de1051ecf3ef39ee7c7a164d64fc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USK110921310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8416a7334f7dc8431c13bc2a0d5691d0828653623dba5fde2f46bea549a18b1d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USA2B2404083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee31a514859c5ad21ff48fd0ade2998f3acf7c2bbc9d193dfa636d9cbbfb67d2. 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/USA2B2405151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba0c4085e10ad32657caa4d5a3d01429885a95ff0899efdc66626464024294. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2B2405147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b6795941e0d7a4d79556b051dc5ab81338b53d6518be772162de3d947c9d70. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2B2405152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154952cca0482205dbbe79c191dfa96c919fbb88ecd1ba7aa86f1a48c2efa42. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:29Z), 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/USA2B2405149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4260c9505ee2568a04454f23588df5aa11e45e62569cf64e8ecc1b717c12b61. 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/USA2B2405150.