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 0x3ad8ae93b7e9fd3d2d9d9f7e5b37bd40c6b2983a2041f4e23af2f32ceca13304. 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/df76df8b-a6aa-4133-98e0-96378aeff3e9.json and https://artists.proofprofile.net/proofs/artist/df76df8b-a6aa-4133-98e0-96378aeff3e9.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 0x0b5f9109dcc9a02c38b5fa85ff115a5c10062d8e1488010a042502f7ce99fe49. 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/RUB318910001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4866d78d124b6f5c4fa470507d41b05e368aab2f372c9c2541b58dcb9f33d2. 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/RUB318910003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26571dde738e3f1d62c7ccc308db1937687d726bdecb4493eb479c6f6b30c710. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUB318910006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f679bb8efb0fb3775670b05273337673f76feea753e11ba7ec128e39bef7ca. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/RUB318910008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c204368c00f84488a10aff4bccfe7cf5a4a3db147441983d7d21f1591c170. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUB319009801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c44ff367fc21e48f7f03ea7e23b4b09713b3a878fd3615a92b88d8bfcdd6ce9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/RUB319109803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55106cb8788e01c3d1b95f56147385f25de79f1b9a9f84c616f1cba49dc19015. 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/RUB319309909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe59d8a9e0ee66416acd6c973c30863554bbf4c46ceb5a67b5468d301ee576bb. 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/RUB319509907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483b6b3df6ddc8c501f0289df3f333d3cd031919ecb188e2b34480ec1bb2341. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUB319809914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b847e68a7691b6da6603be6016ebecac8d57a59f1ecefb640b9dbae5b13a72f. 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/RUB311603602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f56000226909a4737bb46f6080a61dc7af9a4fbb7fbab13deaccd5750be8c8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUB310509803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa14c0c3586ea5c07ce392cea757f8ae7c69e4e810cedd45369ae5a71c4b9404. 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/RUB310509804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbd5f369661ad9d9323dd736a2fb7d78d7c16bf3e1fd6eddbf5a0be452fd591. 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/RUB311104601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a93c24084216d0f3a11b88b1c47054b420e7fc23551c12021a50e00640bbb3. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/RUB311808803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f46cec91b6f774c5bfd4203021f5932bd49e227ec885c189efe4bc84a8982d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/RUB311808814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a4b758ab47fbc10782ea5ab7f230ec65bc6ba3ed849054fdf2c15e546e8f2a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB311913806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97c440bbf01a30ab451b7cf87097aff44a9c2bcdb6e5ba3dc80b965dc3c5ae2. 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/RUB311913810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86acbdddf92439af20ee7fd754a4bf173ab3c27c77ed2082ee884441ed45780. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB312213901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5e3ef9e35e9126276dbbab778e5aa6bb75c2fde99f4cba7eeacab85c97a63e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/RUB312213902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a84c45a2fd5c9cc0f2a6f2fd1680d12104203b3c43d4cd6682712058171f3a. 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/RUB312213903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc0f6d9c3faf01bbc28410c0cb6cb5f6a04850a8a15a82e050712b8d3f881e. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:25Z), 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/RUB312213909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e011218bdf19512c653515701e40f169d79befe70967dc843edcd9963c4e6e. 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/RUA1D2425434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a93c4ec82e19584fcc964310804011dfe39aaadccccdfc2349d0babb5c0bdf. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:00:28Z), 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/RUA1D2425435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbfff44ca457281060c0d028f640a49a3e4628174886ddfeac35546783f6e6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1D2425436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5806acecba645222568025e6dd728ae759458589575ee207d4bf61c8e4ef10. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:38:43Z), 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/RUA1D2425437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29361a4b15d6d9362a2ef669be02c292114948e62eaf176b4d7e17e01ee56dad. 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/RUA582002473.