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 0x52c0e306b784caa7662e0baddb8f2a9bfee0e18448f2d6878b78e3fd07cf623a. 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/943d9a5f-eae5-49ed-a7ae-576f64be3b44.json and https://artists.proofprofile.net/proofs/artist/943d9a5f-eae5-49ed-a7ae-576f64be3b44.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 0xf1948502d22e642cda2e1ea8700d073616968e0e44161548682fa268ad2dcefa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:38:59Z), 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/USDS19700171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be48ae017403f85ce8e917735bcc85b00f22eb66a644ab177f9b56fb0d3e736. 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/USDS19700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358d716c3008cc27e39dcfe911134f33093e40e3ce68deec9f388d0a601275ed. 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/USDS19700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875160845c73b85dbd52a34ce7bd13b9c3515d215c7073b3203b66ea75d71842. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:32Z), 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/MXUM72004539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2603ca5cf0ff9383ff20304ad08866d0f1745d89a6c9a52b22208a94ae704bd8. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/MXUM72004550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391eae4b4b5a6a56c04444c3fa582eb99cfb327b6c0a0611bf702488a7f013ec. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/MXUM72004553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac45f7faf40525da389b0bdc286ac6366b5af6e7d36fbd579cc974f9dcc63df2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:06Z), 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/MXUM72004591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098707cb11905dcb67e677fca8cafd0fa34e2926311e0b6fb1ac9289823ddc68. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/MXUM72004592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9370c56fdb926c16c466374cc5d081d5eb3435ad9c30fe74020ee18c165bee9d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:02:47Z), 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/MXUM72004594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f44dbd533f042d9b44f9eac2c1a22cb6967c288b46810f206df61b98765cf9f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/MXUM72004600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc6f55129eb65043fbf4b9d3d0474ec55fac18c9adc8ca56694965779ce7a3a. 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/MXUM72004606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d66aab25476a99b7bfd394e221fdf8d97188f64a514d89a933688b0669d5d9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MXUM72004634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e89d73d1e74dda10711f977ae2820f08da03e0d3a1b761f1f1e964cf1f062e5. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/MXUM72004637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f34a09ed6c7656cdd8b1f0fd5cdf0afb543f945c326b0bdc37477fc9cfc48. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/MXUM72004638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea0a09ddb8840cb4a2739071fce651a7e9a21cc9005b1a74a8be022f426935. 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/QZW9K2366629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13086f977ce3f34c305bb5bda1f5db0b28c2b27cb34430ee6b72ecd282adc9b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:17:51Z), 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/USCGH2088156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec5e8c2beb9bcf2764c329cd0fe47bc687ccc9734ae4ccf76223e56754285e7. 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/USCGH2088161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d85bc457ec37f54c6d5129f572c0f8c246241d7b05234519efbe1fb2a2cabef. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:23:57Z), 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/MXUM71003905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7355be58af074c4f957c28a600937a864f24c548306aa4ffe297b50b9c89151c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:27Z), 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/MXUM72004538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad34b3b089ab86042877c706f20869d0f8426936d1ae2229939106a208052d81. 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/MXUM72004534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8164476289ea01a041bedd0e1c15f076c392927666a6a5168e92a669b1abe43. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:12Z), 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/QZNFJ2405252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe850f4bda25609c46101355b6f523c35f1ed980c03819dd3afafc2559adce7f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNFJ2405253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a348f7f2daa51d027272ff1e8e5a49ab9bb1c2b2145687556ec568dc3c213b. 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/QZNFJ2405256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ce348177bbe692da4841dccce4f8a1ec0660afd5143c61dadfca588cdf839e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNFJ2405261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4218a63dd2ef0db8637ba34b6c326b070076232f422da82b7a91be9b4615599. 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/QZNFJ2405262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc1a6de63b635289eb6c67321e355adf0773e954c8aa1c2c8117ef384debbf. 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/MX2972320420.