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 0x27ae8bbd67f623e0f8b4bcd7907b498ba8d16d314a3c0a614f2f1989b5f18003. 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/8b7dd084-04dd-402b-876c-825364e8e738.json and https://artists.proofprofile.net/proofs/artist/8b7dd084-04dd-402b-876c-825364e8e738.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 0x19546cff275b3ba56edeabdc2297865c0f1d4a3f0589963b6eaab417d16fbf43. 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/QZHZ62245504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cb71088906ef68502892cf8ae26a56accd2f4b5e39381e625d64d4a2aac965. 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/QZHZ62245505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b398e3f9d614fc652d4fd49f433e0390eb97a5e6b7f28c419e59397bad6222f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHZ62245509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00796c7001d2f438c72dd25c61825ab9a6f401e6368792f2f67fed9f2643b4bb. 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/QZHZ62245510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee660d1a8deb68e195ef05aa69f7393f924f7bc60d7c671a3e660d4dbe4ab1b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZHZ62245511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbefa1ef4294fb320c4ff913b22cc717107c480c2cad3e7779363b4d31dc91b5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHZ62245512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8367de01ce26d76dd92a9759ae80826600f48b0009648cc8d4a08499d046c450. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHZ62245513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403c36c0ad7d682f80b31d81586edb907bf92f20b4b3021e9ae2dbe9a32de00. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHZ62245515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf5589fe0f9d7f69b52ee608935b7c537c90be405310e1e6617943ab50be5c0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHZ62245516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b57df9242c3a34f0ef7157ff2f1fcc44d5e7d302107cd06cee883e34ff7504. 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/QZHZ62245526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd16323b607b83ce4ca1b0f872724d1d5b09475d9337c0f0b54548307769fe6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHZ62245531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56625dbbddee0c5522845806dbdbdaf5a84e775d4144cc41f899cd40f08822df. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHZ62245532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6a08953729a44b98f851fa42add886e5119b3f9ce61ec4b3ecdb7b51e9e4b2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHZ62245533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc335fe0dfc2e5e20b3fead586bb3a961b2c7bdcca5854071210739cca58b0. 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/QZHZ62243931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94350ee75579a29b09241fe717c269aa95dc0eac497b22555ce40c0b03793c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZHZ62243932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e305804556a8758e1752c775d97cd4033486470744b93bc7f2ecca6624e0aa. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHZ62243933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6517d33aa8375d15fce6ea5dc5c117079ea8d0b9339b768cce20a46eaaafac29. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHZ62243934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31bbc2438bc56bd83c923432f3764c6b8e7c7e17d40e4e1d3828153cb25ab46. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZHZ62243940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabc1d14d700ee37144705f76e960fa3385861cba08f811d59c9bb57059de82b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHZ62243942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676b512d4add47af3c8ce3be01dca468c3c13d78ba8c54dbc29d89ff3bf77ee9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHZ62243943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcfafd246dee6b4d7f068a64f14ac92203e2b3410531e18c42431f1f44d6a47. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHZ62243944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211c1d986145cb9d6ea7ae1f0ca249d8f582659554e8198e3484d79c4ac7f88e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHZ62243945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2dfe210b878562ac05f2d6cebfd33267cb482e48512a5138042707d611097. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHZ62243946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5e42751d64ad9d9d61abf127592620e02d1f546208621060941347dacc509a. 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/QZHZ62243950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862e5095e9e1565eeb7aeafc6a5fdb01a656405394d80da28fe05a9e89211660. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHZ62243952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a053eaa23b423dfabb86993cf77f4366bfbe29023547186e171763a0985974. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ62243948.
Resistir e propagar, combater sem propaganda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b076c05ccb88aff9bd5d85c0552feb86cd165de19bd33448193ca88ba88bdf. 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/BX4IU2504535.