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 0x4d30a6be3580c426d73f5ed16e73ab8a5b405a652f0001f5a87e94a3ff082074. 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/cfa44d69-b666-4f4b-90bd-8cbb4230b72b.json and https://artists.proofprofile.net/proofs/artist/cfa44d69-b666-4f4b-90bd-8cbb4230b72b.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 0x24a0a144a39d351c6520187bbece7d4bddc909e49cdbbf404b942495e89f60dd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f0980c0836380ff52ef73cc3c46703d62bf1fdd2d4c447dcd6e28efa99b70e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d0189ba295e26e1f30868f94325e5523b49ef4ce629fcd7a2f7d639f709b73. 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/QZFZ32529514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c3d2874820ec9020a00dba499d29838242339235008e6b8eb2162403d58c9. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZFZ32529515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cace135e4ac40ad28b53de3d9e5dd797d380cc0347834b9167e11b37a14a80. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZFZ32529516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf479cbe53ecfb7a1f18f73fdd46bdf73ef9d6deaf303693c265939b03bd1c19f. 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/QZFZ32529517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f59c4df61e2109b60d0f93371d7bebb877fbbc70109e057cac4d62d66fc9ab. 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/QZFZ32529518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6483500ee7a53c8b93c94e3d6be303e057c49e0b838be1bbc3dd233d5ea21ab2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFZ32529519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe657e508c994fd3e897aa3c98daa117feca69ef71221724977be20e66dab082f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZFZ32529520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8925f08e2f22577df4a47f63e7249b4148875dfa229b330d8c8e732f6790283. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ32529521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f09edf2c690773f8b34a79f507973daf052cbab281bbff7418e1207f3757e5a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57570e32debc356b3fe925b1727f8078a39e03b36812f7bc6adfb093a4c5f423. 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/QZFZ32529523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc564c9b2c31d66e09b6562e540c1f3b0bcacfaf7899e4841bf9c810d8c613e0b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec0310f971c24af088147868d7c95978450b636296c0b4a5826c19d3e0cd6ab. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFZ32529525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc4a57e64630d1f21f1939bbe01dd1a10cbc6bf1fdc377e6c8f03d7c43347a7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ32529526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6ee5c01653f1806bd3100693d0e77469d8fe21f305d56d3054ce37ea4158d4. 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/QZFZ32529527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1eb7cfa8a320f7bf84fb3396a91651fe9f4637c64b6df53f55004943f7e758. 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/QZFZ32529528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9cdd8e63525896ce516505eedabb4ac67bd122604366d9fabefcf51ef7b00e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b3db81b3a5e02f0ae65c078418b1870521c8edf2c75c7de34861895a4bbdf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ32529530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ac86fc100b4e9238cc61e476dd8853f062f9df0e5b544867c6adb1ebb083d2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9deacdee29059fe2d4ec28b1fd5d179050093244d71cde5fda97594de0e5321. 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/QZFZ32529532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b8e8a49d0ef1713546ca48e10a8bb29c798c4d7087a76005bc4be358794fe9. 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/QZFZ32529533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d57574f5933223e74b12afc0e3e6966809704608aff16c3c0f49c141a6d107. 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/QZFZ32529534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664249e1da0a2565d4c970c8b16b5a90bcf081cf9cbdff9f1cb7745c17e7afd6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32529535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf38209ebeff13d9b4675a17141cafae2371df4d71f03cccb9199ef0b9dad30c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ32529536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc6ff3525e3710bea3a78332075ac10963d29a601b54b6313d58a2a55f4f2ab. 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/QZFZ32529537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe2edcabd9c86ff3634c375a4d46a9e89256aeb485099453f6841f22ba19df3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFZ32529539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76541e3382b777d4240fe8629fcab1d783c908cce522e3f6272cf0bf7f9cd2e2. 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/QZFZ32529540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14262d62d96c02d968d400c42cefffc34f46dede69406ff51e746fead7f0354. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFZ32529541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78f29b5a421ca6baf3277f93e25d21cce22f799b21e1478e10113a3e1c76d51. 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/QZFZ32529542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad0a6095e758590f0305552663b87cea0f1afec0b3d9fdd37ac341120af0305. 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/QZFZ32529543.