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 0x3272e5eee9f6623d3345be3e5b51ab6d25c92af2ea37dc60954d234d9e2f1c41. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e81abc7d-ce38-44ec-8985-b66573f779e8.json and https://artists.proofprofile.net/proofs/artist/e81abc7d-ce38-44ec-8985-b66573f779e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xae9dbb7960ffc7954f3470e698cc835eb71e1d67e1e051084ff9933016edaded. 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/QZHZ62116180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1f89a90a8de003f8f14d241fa971cf3eb7b613b63a5728d7003e8ce30f0db. 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/QZHZ62116181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3750be712637f6057e5ba39b378bef6c8e3c68008035e30d6ff2aa8939904cda. 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/US7VG2255273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd09b73af9e855b137a40fed99dbb1eeecb05d1115d9f33826f6e55895eb1aa. 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/QZNJX2178281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a412060555585d13ba6d5cdc6f60b2b3ba64f87155ed45fba7727c161d8571. 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/QZWDE2475718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698f09197dcf5b9257224cb5f514a737600f12a2800e5c3d35c3f8c73f2e47b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZWDE2475719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd059903b4f7587d09cb3e8e38998943000941b16588e902ea08788e7dab91343. 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/QZWDE2475788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0159c0ec122afa509919b31e9f949fe3a19dd2cec92462a87949b00c23d03e4. 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/QZZ8B2439480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086d31b3d3d773e8798c2bfaa06ec3667bf1f8d551d89b0f058bab37adb80426. 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/QZZ8B2439484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cc2b115c8089683a6e0d2c8568060da6f490afed5245d3a4d7a8caf73895e5. 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/QZZ8B2439616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d85ad0f298b876c5e87d4d4225eb9b63e31df082671bfd725e239cc2944ec68. 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/QZZ8B2439620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e7ad4410a389c5378133f53aa95217d4c19ddaf441ab577151cde6609941ab. 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/QZZ8B2439644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ffab34572f771daf8aec612d7f4f98fca44df8f0c579f791cdbc9dc5195c0b. 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/QZZ8B2439663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854c357635eabbc95bc3dffc2408fb1db83d161939e0d2aa656503f4a49839a. 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/QZZ8B2439679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4604c2349208ffb427817e59ebddeb170a07f4186cac2247045d8f321b64a0. 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/QZZ8B2439683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd983967651bc59439e07f348021bd1004a2eb0578f0f804079a7ee83019bf7. 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/QZZ8B2439686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4267601ff3ed4c4042810f775a2f1c2fc2824cf0037d7404ca37c1901d4b945b. 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/QZZ8B2439696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64e7ac3bdaead97833c822e404e7f0ae33a34f808d769e3d74e213f066c68d5. 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/QZZ8B2439717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da9a919ac0a5308e2358075c6b0aa75a9417a09e50db25a6a29cbb4bcbf89c. 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/QZZ8B2439723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ee6be99f61ff56107ab4efe32a613926bcab4eed3056c1f766485f6915c3e. 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/QZZ8B2439768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6d1f8206f483316bedc9266070a2f3560ec30387b10074a0a313e1a32a20e9. 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/QZZ8B2439774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f100f77333e2ac2b3fa3ecaa331ff958be868dd52990b7f13cac8d758f0a70. 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/QZZ8B2439783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f03d5420dafac4da6d648c16b508feebdffc4b41fba1b7c71719d6ec5e01b22. 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/QZZ8B2439837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0153d7d3dd5ee99b493c098f4fe6eb3536c621daa48f57e4291f35e281e07799. 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/QZZ8B2439843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2d1056902ef188a992767b63bb7953a09b6c2749bf3dc9fa280c9604ddb990. 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/QZZ8B2439846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99159aa48156cfb3181a3c83ac6bcb0f70716572df0f030e55ef1e2183d7675b. 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/QZNJX2353859.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3cdd88b7d84802eec04c583f39d02c2370a0132e09fbfaa02ec86e68f2db5c. 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/QZNJX2353869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898fc6a7d4def11215a35304fe0497d701744ff6a4d2f69d9798f3669b905cd. 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/QZWDD2281660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be981943f8c7e0440310e8f6fa0a2e7bdb31e36323d704e7deb5483c06cb49. 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/QZWDD2281701.