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 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 0xb547865291738d0f77b9cf0982a4266b062150afec52b1ef703c5c18b9fbb650. 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/446a6989-6cbc-49a8-adf9-52f6a2e0accc.json and https://artists.proofprofile.net/proofs/artist/446a6989-6cbc-49a8-adf9-52f6a2e0accc.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 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 0x7eb57c4fefba8cb121b62e3a4b62aed9020c1935e74997bbf62ce706e2f2e8bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G1401600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ee4e1354a21b1d8eadc8de8b498f13d75863479ddf04c175c44eaf35406315. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G1401606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed0a6c9f4accac70207cf43d0550162fa796d508416fe3be39c0d85414ec25. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G1401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f0dbb5cf300ed71e17492850a9f43458fff8b7801bb9391a2268eb8ac57c86. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:51:30Z), 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/USDXS2204041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26cc4e804df156a98bd369c4294a0ba13801db8115a9c110848fc52fb31fe1f. 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/USDXS2204047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e4b8e41e267e6f27e8329ff6d29b2a82aebe688841d1db20fb488fc08acf66. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/COC019723004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe6b5b9ec3b32cea3b78a5f344db1f1618adbd1c8827723548bf4022d1c5fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/COC019421975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5584f4fda727703ef868d67f8781e7b3037a3d1e33f0789c12bc89857d97369b. 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/COC019722994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11987a0881c0e3cea2e587d4e242ccc4ee12a06e27b23a4a1722cfa0f4cc6755. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/COC019722995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb705319bc4e5f85283fde0f09020f273fd4d89b1ca945403888a02b870492e02. 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/COC019722998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5b9648ebe4c62dfd3e3e62660667299fdea1b0ddcffd2868bee67ac54a267d. 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/COGY11300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11439bd1cb561dafbe96c1c90615dc6958867b144fb8194ceb3e6920a90d6ea5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/COGY11300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf87f615a8c4b790f9abf62396d183f364b80a4df28fe5678f710ad33ba44fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/COGY11300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5584f4fda727703ef868d67f8781e7b3037a3d1e33f0789c12bc89857d97369b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/COC019722994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11987a0881c0e3cea2e587d4e242ccc4ee12a06e27b23a4a1722cfa0f4cc6755. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/COC019722995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc580c6f704c704d909db2efbfa1a36e9a3054778f51b564e7ff931a86e3b198e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/COC019622996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb705319bc4e5f85283fde0f09020f273fd4d89b1ca945403888a02b870492e02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/COC019722998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e4b8e41e267e6f27e8329ff6d29b2a82aebe688841d1db20fb488fc08acf66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/COC019723004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe6b5b9ec3b32cea3b78a5f344db1f1618adbd1c8827723548bf4022d1c5fa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/COC019421975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eb563b32c6a7a8a91c24e1b4616d0875671f8f07659813676c203476248079. 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/USHM92095025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc56e402eea388d798819fe5beee7d5df9007166a9a65328d4b3a65fcedb4bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ41983130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d1574d09dd35be7db8d71d0d665f517efdee0a2cc4a666089ad274a028623. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a681d7a8e1f41fe977885fcc08795ebcedd44d4a3fe2bd18b3dcebfde34681. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3939435a80558b67983961c3e7c5a38f31bd554830cbd09b7638a1fba1b15a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5909b0b8b8dd7a8230fc6844423235e6d6d083e638002b1a7bf7d52eb580a11b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USY242438315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535806e301a4e542ebc3cac9adafc6077c9a60b6a07cb881eaf2aac40a4321c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afaeaa5ee042a6d53f025041e0cb1e4b8bfd481b34208a19b9914fd9793f3f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12873040fb754f1e299bdfc6d4cc925cc1893d501e951509cc4e3b1db8ee0fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dfca2bba3f546cb13174da1df46a303dbd9c39b1176e297bbf0d22fe0226fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc533ba1703426bbda3161aec777ce5539ca1fe4d1fc58339c52c780d7b84243. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80748b7583ea2572577d2cd8280bbc679233cad077d0566a59a6c7fc7cfb946. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe032924f7841da3673a456dece3e3c7a05941c6626fed570d1069e71f997fd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff938b1d90486343b326e5f138379463e79590d4f0374d2d9a701e93f96695f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926557e51d72938d06404bfb1901af928248a1f3320b59c76b7afabd406f596f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89137726f4ecf07be50110c86c5b09d626115d8d5206b83c3006306c842db6fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566eb0d930735d8bb81dd8cba9cd1c7e7ebc5ee8992d0209bc194366d5f23c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556c3296ab8953c44b62d8844bb19dc48b12d2c59d572d83bef988a37983f1b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242438327.