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 0xa7411ebaec3143cece87f81a419b561bf23d517e0077d490dd7587b26e19e8e6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c868fb5-5b9d-48fe-ac34-b4a9a738cc1f.json and https://artists.proofprofile.net/proofs/artist/6c868fb5-5b9d-48fe-ac34-b4a9a738cc1f.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 0x3168ea70f7a7eb395f8e5728eb75ab3e676566eeaa6e56deda5007b1cf78698b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZFYY2275225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cc3b96d9cc202401cd508466abfd49d1283e93a0801b48ae43b1773792b0a2. 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/QZES52270835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f726a9c3234f815d5b76f6b8074ace4e448a3cb7279e513585f86b614b96ab0. 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/QZES52270840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f695285bcde4e6a677679513e73c21b3a3c5c0364984d65138fb88211709cc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:58:28Z), 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/QZES52270843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f4596dc0faa93a0444f2b8671acfcdd6765739f84b365ee2c9d885fc1b40a. 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/QZMEM2279187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84490e5b9f99df690c8318ef162659e16562dc503f6f82cb7258716f5316bd75. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWT2225792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485383dc343ae13107cabd231bd572bd90a858bddf906a308d498242368c668e. 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/QZRP42220989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ae78dd5c10ef96f37a82d0bbba8410a6024b0710a5752a3c70a58c00478fc. 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/QZRP42220993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ccf710ddd2fbcb7c66d998f597d956711d7d704b6a0d227e96fa5de155716. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZRP42220994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb476ac9a96079cf32dc8cfb3659d4d2512ba3230d9e29ae1b6dcf19942221b6c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:52Z), 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/QZTB92222885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8f53dcd4646eb878f2a893c6bd2c926eb946ea3c1e390fe48fd95d12b7e0a. 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/QZHNA2366193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef143d2acc709fb83bf07d7e73c512128508a4c834a89c6cb563fddd9c1bf138. 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/QZTAX2300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061409325a5d8cf7ac048b136203e8f20fb779f61661d0e560537fc6b9fa792c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZTB92372025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279b62488b87eb354a534258e36672b0ef9783e9568e64b2ddb3abbb04779e2. 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/QZTB92372027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d020f1c994daf66bd4fbab273014625d18118d667cc0cf87fe292ee8a8472f0. 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/QZTB92372028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb9d989756b694baf75fdf2ccba86bb328b0bd23e598d5dfe017bcde3c4d4d4. 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/QZTB92372033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcde9967532e56dbd014039a33ba3b8a46f9be9893baa388c8067269f0079a3f. 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/QZDA42420652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a92db1a6d747898d8cb26a044eed03207b4ea7fd77fa36ffa39d17086eee483. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWW2446766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370da81af6390dbdf0b35f42e53571cce3e60036417343575fd7de65529e056c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAU2467831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c4342c24cccc60bdb030035695d216e4101e88cf7e92fb6869fedb1251a08. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTAU2467834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714bd604a5bb7dc511689e59542a00ebb713dd0a17e5efffeb6a8943b143be66. 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/QZTAU2467836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4764a1ae5061118e45986c6a3921c85531032f071851f4713345b8ebdbe4d65d. 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/QZGLS2531412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddf6f57e2070e2146eb834b3deafe2c423ef3b275c54946083fc992e97621fa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZA56E2527858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bd64ff415e1cbbaf17cce69ff7e0a8b095c2dbf02186d1bb7bb0fb8aeb33bc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:44:27Z), 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/ZA56E2527862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164b8882ae992a01de96fe4c732a06dce8a3c21c58711fe9421388ab1ef14cf9. 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/ZA56E2527863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d646e5c76a8b2cbac56e768fdd27bf6aacf325794f448876be852c11120cb58. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ZA56E2527864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5e5de61aff44ef19263dbe7b3a0ef1a7fd9d135e8464c7fdc10a79e03d6c55. 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/ZA56E2527865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c919453791ef61f2b262edb373681a09bddcf5ec456bb356397af3be46c1215. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ZA56E2527866.