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 0xc4e1899752ee8cc43292e4f7e9cd035f7fa1ab2d487ba83a6f67cd0871d6cd59. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e470577-116e-4be7-aa63-9895b5e9bcd0.json and https://artists.proofprofile.net/proofs/artist/6e470577-116e-4be7-aa63-9895b5e9bcd0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Like and Follow (Score The World 3 Contest)
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 0xe931178e02014685f880555f7ee14a6abf1aeeef8334b17ffa7d4942f0ce9a56. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM3DF2296743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4478a36be931c62ac80abfcf1edf7ef32e7d40e48783481b782b032be7cdbb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMANG2212655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56e1d7b6ec125fd74ad2f05c998c4122f31e459257914d39b2c636a6e30c01d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2410688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234f2173f0ccc24756b94a67105d3218f28ae2b670423d065ecb226017a31211. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/US3DF2409543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6752fa8aa809ceb29ee3b86da9c2e6c46d8ae5604698a889652c71412c8c3bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKZGC2409629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35e8dbe5d609648c34123f786ca5ad879ba10e09aab4f6b34cdd5d809a3307b. 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/UKZGC2409627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e702b0f52cbaffd4722ea766393d8eee4abdf1d9ec68dab6abbc38ebc813e1. 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/UKZGC2411317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf51dc5a306c66371427265c4a91e3b82e1c55e67457f4e058ac8c019417beb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UKZGC2504355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e336d9689a31e643536e98e54f2e732c1f8b11d6843a62ba7f2d778d7bb026a. 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/US3DF2434138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa1ba051d300d5b6dcdc99d5b37580956b52f2316ab6f841f0dfa727ba917ec. 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/US3DF2492422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebcd05baac4ffcbd5dfe011173e1640356a8bd5900b3ddedf442867ade358d8. 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/US3DF2427023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1440698c048b86332fc9eb74021901b36a2fb66376cc349043103962fc47f2b8. 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/UKZGC2411312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35e8dbe5d609648c34123f786ca5ad879ba10e09aab4f6b34cdd5d809a3307b. 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/UKZGC2409627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6752fa8aa809ceb29ee3b86da9c2e6c46d8ae5604698a889652c71412c8c3bc. 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/UKZGC2409629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e702b0f52cbaffd4722ea766393d8eee4abdf1d9ec68dab6abbc38ebc813e1. 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/UKZGC2411317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1440698c048b86332fc9eb74021901b36a2fb66376cc349043103962fc47f2b8. 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/UKZGC2411312.