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 0xb8c8a432be52f96510fce43a1c11e0a4888a1dc11f491e9d9929134108a754c8. 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/a199f188-245a-4156-b1a4-9e1c705a92f0.json and https://artists.proofprofile.net/proofs/artist/a199f188-245a-4156-b1a4-9e1c705a92f0.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 0xf49441e63f88982317822c6ced3a8f3e639d1f2020d2f0d03d96327c24b98cfa. 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/QZWFN2379562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe2cba2f6b9b90f77bc5c8252969c949c3a1f9a00f15f369ae5367382146f6f. 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/QZWFN2379563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad72f76889aba855c6e44be4665951fead52f0b1d25d029bb4643cb7ab98896. 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/QZWFN2379564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0487bf2c381d4591712e34bd3d086d2f6fdf6e2e281b3a8c79bc4a88808e66c. 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/QZWFN2379565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971809d5e4dbd447f520f2a627d2b83f7f936375697fe126d40500efdef3815. 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/QZWFN2379566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf177dc6a24d38a199fe503488350741dcdde3c36552f65f66eb31ac231a5e17. 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/QZWFN2379567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813675207ed8a796a86f5676b5f51eeb4910372a96c5f783cf8a74274f557d66. 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/QZFZ72396336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5fed03be593144dcc763d5d403cf8b011d2b0f83e8f61e547b7d9ac072d798. 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/QZTAZ2239189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8519ab27c12d7942e00fd4b9c048bbb9606743f87350999b15d04d8884043886. 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/QZMEN2237188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415db911b1451f8114d2fa3e1452ef0dc6bfb4defc15260181ebd6f8341bfa35. 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/QZNWX2125702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a5967a7bba633949116f012615f08a6e6d2c6814c74e8ff154659490062ec1. 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/QZDA52169284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7f3259e86dc594232afc95e6ab34111e534bc0a394cdcf9ad795006b218a7f. 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/QZNWS2047763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f6b53ffbae8368effbca4a96b6d2f8905bfd4c0b4881a7aa633382aac4b96. 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/QZK6K2055062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc139ba11bdf662f5ba83fb269b53779b6cde477deacac56b45df48c0a03751f4. 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/QZK6Q2064132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714ad985f86139fdf8e14c41a5125bb496fd1a5721a102260ec7052655ae19c. 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/QZHN52039559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb42a8a520819efa5dafddbb90f06597dfa330f38ef6821130e96220b4468cab. 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/QZHN32084679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2763c9169fd945b63d6fd764a765e575f0095d34d604f7d6203d428533db20b. 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/QZNWV2416100.