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 0x1adb8620deb8d4dc128e2b5c24c991f847b4a52dedd54ba7996fd141c9054be0. 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/ae4890eb-afc5-41e7-bb39-ec984b1fbd03.json and https://artists.proofprofile.net/proofs/artist/ae4890eb-afc5-41e7-bb39-ec984b1fbd03.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 0x59492c6b99adea13c40e2741205c535a7e84f56c62b75bd875cc5914b1807972. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/UYM121700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3094ec06be0313faf163c05057aba63052051094e2d26561c530fcc6c4467bc. 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/UYM121700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccf378aa537f29d3a912afcca2183ba76ca4bea0b2e08eff899dde6a371ec4f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UYM121700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb172668d999dd1f73fd0c25246edece4637cf26aef3cda8ab23c333aa0aa75. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:02:48Z), 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/UYM121700315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8b0af5f069019c4b1c7a362701242d36368580bc6cbcc8673bf6a90fc7c3af. 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/UYM121700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe586a74a001aac5852648fdc0aa2e278ffbc778dca929c95cbe1a27053f6d8f5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UYM121805393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb828e954576d4a6baf3071dbe4a0225482f4e8e12a9042994b0286310c24d13. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/SEYOK1905981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b90ee93b50809429542891f85ad9dcd213b8f164af09f9546697166e9e6a0d9. 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/UYM121902915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb1ea6ab81e4cc97e87568705da9c3711b3e326e93a5eac9d349c230130955. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UYM121903911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597bc1c939e1c40fa0f50212b61f981b61893c0ba51da5185579a5edcf0226c9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:50Z), 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/BK4DA2540299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6092aa89e904895aaa7d48cca55c672dcc142d26ba0cc1a4c74ff35ca6ae47. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/UYM122003466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bcfac06cbc4ebd6b52a1aa6e85268fcbbd35415f94c6bb13076ab92a06593c. 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/ZZOPM2119464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3aff579fcbb048448936b3d9e3a20768c8d4247e8dfbefa70206575d4551a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZZOPM2226287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9bc718be14cf1dc1922e8c0be9571e15bc9ad73275ed3f8c4b9965bebde2c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA61502837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6937376225240421d7f0f89c814b78bdc1be0795c68f2028967fc1698c6a9aa3. 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/QZNJZ2275040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1015f6fa7f13a6b8e5520d62c8592220ec0c6f0e0358a70b755a835d5c4af89f. 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/ESA012080060.
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 0x5d86b6fc3d9925b37df4721200cf6a87ff78cd441914983ca58210e334bc278a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UYM121602479.