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 0x8463ffa5e6f29c986fa699a03ecd507fb469f5cb05093fcc5a368fa2e8a28825. 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/33ee3216-a6cc-4b2b-9801-4bdaf37542e8.json and https://artists.proofprofile.net/proofs/artist/33ee3216-a6cc-4b2b-9801-4bdaf37542e8.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 0xd0b7df46e4c9bd4964f9910e8373c06098c45ec7cb1e225bfcf8d0372b4ea084. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBEBS0200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4460dc3e7a857863e290c56d14d2165237ac570fda4611d0e60b81c3f5b0bfed. 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/GBEBS0400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3c270dec008d14fa72cfc7ca62f78611406a9d0540d3c120fc3942364826c5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBEBS0400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a10a9fe5f6f8129dbb266e163135956d3b2f3a39918d870879fea5b38fa62. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBEBS0400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cff73f331c6b0e3bfcdb884e9eaa6416abaadcf7e06b38812ca8f2cdcf6f10e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBEBS0400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98d0f57e69079323a2f4f01a2e5f3a649c37910e687a0adcb6e7eadefe24ed. 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/GBEBS0400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b46d9a394906bd0839dd46b08eaf97db91411cf104596ad3cfc33bb4d8cd3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBEBS0400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045b176db76be408b40869adaa342166fe913cc9c2b64efa6572c680108a231c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBEBS0400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb494d6817f57da6af811032defa3bb1712fe680cdc4607842e733086c3287d1. 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/GBEBS0400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca17c5efe6784791173b19a659636bb128500ceea587c62689840383b1a5709. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBEBS0600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae87cb5bfa44074c66b7a6cf3ad2f597b89beda63fb5aa7bc65fb1418fcfacdb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBEBS0600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed82c255f9e3071c9d069d2f9fa748bd40e15d2ea64f31cb3282df1e5cb7f17. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/UKATA1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a09dd2d72fb0deb3f49fdcb0c14b03abce502748473599c469eb67c55f8e5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBEBS2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63e91e47b61d6a1f8d8a326039e934ea622983072289eccd8ac3f87db6493ec. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBEBS2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ffd96f5dff44248dca31de8f74ff122afda23bb44616771f3bbfc40d134c4e. 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/GBEBS1200004.