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 0x2ff258d93f491baa5b3ca6c2fb72e28ddda92835be837d2aff30c1ad72900aa1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e442e2b7-5c44-42ae-a640-7079bcfa98c9.json and https://artists.proofprofile.net/proofs/artist/e442e2b7-5c44-42ae-a640-7079bcfa98c9.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 0x029996fbfbb1ab7a06019bb03f12273aaf6dbe849ea78a9f6e6e96e7d1a4bc72. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4R2365586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d6f81716e53d1dec7033ffe7a9be295b8d4e39b513ac3feba5f313933150cc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USL4R2365587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb616a3985b6901f55abe4d796700a770b5d6129b88f2e80aac3c838569895a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USL4R2365588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d755c4f2d9d4e21963588bd64aec02e2de02d0578675ea15cd147ddff0e94d1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4R2365589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2a815da8e871d6cdafd9e8c627b5d6477de75102e6b43939d683b273e47479. 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/USL4R2365591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ddc90a337cb8580886bb3f4e99afa3a2e2ffe22dd0686973b846821fa99497. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USL4R2365592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e4b04b7fb859846d74c17acef48385b729188c7b7fc5c8562e3f8ab8b66e3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4R2365593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068a102202d9bfd096212268f20697e85c000fcd3c2049298dc105c0014b281b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:31:59Z), 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/USL4R2365594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd0892cc1d6eaeb5b7925205c195d7b611e84e96fae2e659336bef7e6158ef2. 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/USL4R2365595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8009903e7060769a91cba03824b4ce0ccbef4c0d20e71a0f0276a9c0262b4c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:10:11Z), 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/USL4R2365596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb451cbb923da12dc0bb4e5f2b53ae6ebac996a46a9e4298706b51857e9f2b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:05:43Z), 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/USL4R2365597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf93e779c4ac053d6aa93822862a8cc8cc027e2c9c978e96030a11eacc01e5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USL4R2365598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efbf2707224db0aba0ebd3d2ece21d55cf60883b94988d0b0a33ce0573fea46. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4R2365709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eea04852a1264ddddaed18e49ed7ff9ec95de561c35aa301510b56c21204d60. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:40Z), 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/USL4R2365710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b38f46293af18a00d084f2cf58e60a916c36cafe62d8b8a2a52c02cf83c692. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USL4R2365711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641165be0c80a5aeb26c588483a7645c7f28ba2b2db5482017334fc951ff06ef. 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/USL4R2365712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623f054849b08fe55add66a0f9bac00151eeab2f640b90ca6cc19c12d16b5465. 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/USL4R2365713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa46aaa465370759f2810990e1b45b4a8fbc1a8f65fdd93ec84f9846da78b2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4R2365715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa349c693ac0986cb6111576dc6e9d567c5dece4d4a34853575b1150428aa04. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USL4R2365716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5e9e156a37590c899ab8d37ed600f4e483b1c9547147ad006b5c4d21988ffc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:42:31Z), 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/USL4R2365720.