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 0x961a7ac976dc31df1100cbef56cd83b7b83d4829a55d59ccbdbea48ef86e3ba6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/222b4abd-f06c-4834-8fad-6af8a41b5b0f.json and https://artists.proofprofile.net/proofs/artist/222b4abd-f06c-4834-8fad-6af8a41b5b0f.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 0xdac8bf6df60afc43695a8cee7b134618ec774aa32b5369c6e3b9d15745e15fc7. 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/TCAIC2453794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fea66a9bbd201a65981dc900136afadebb871c97e3b9821e84cd14886aa97cc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIC2453766.
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 0x4ad698f22c8c8fd61eb0f8a443d0a240a610e41e1d0d242f0f35afaa975ef9bd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:46Z), 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/TCAIC2453779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3bf7deb85311aec17fcb3460528698749e67102d7cf9f10ff14af17098a932. 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/ESA122416131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e8b54c1ab666b1e7801368f51b254df29db424aad714cdde59fbcb87c92cd7. 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/TCAHY2476710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456e096c3f17e96e6de79c34b00e69fa6f90b19e5987b529ea0092c2238b20af. 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/TCAHT2304790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79d2f945c6fc7ba1eafd80c3d90bb3811b253c1be701027ba6f5ed4b5d7d375. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHR2343511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e91090be642c89da45f2ed0fcf245d2ec68bb09dfd99f6555491987c041dbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHQ2373354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f28a7899acd3c4bbabbaabb6a456ef4d4addc22ef412107f27e669cb6df1d80. 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/TCAHI2350301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f69a91e4ed5b56d637eb42523321dabceca30ee2949d4b41eed6a93c002044. 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/TCAGY2333340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee69cfe6e15edee7fb4af58f5004569c0868e3af4a56b503f7f24ae67a7312a7. 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/TCAGS2206623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d12a15ac23217aae49918385537e692fd28b4c86c51ee4676c62f7f35f87dd4. 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/TCAGS2205991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baaee07d3962c23e2bf8c78375d764b5ded57ee6111df502114d7d92b55ea44. 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/TCAGT2317355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8857ea28e5e6d4ec12e8ac60bd0d6f04f6b6bd597f57529e6200f5d8f88fec73. 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/TCAGS2206595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315f80bc0b50a83b64d3853e5f74074f5f776752222f0244284dbfa586e1dfcc. 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/TCAGS2205671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20826d1e0bb2c765608f6ae83734f14b484d3bf8a6dbf856e2a1acda9c8c5b. 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/TCAGR2274973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441375d8dffb8052a39ab4634a5d4b105ee61bec7b15155d2f71e0677e429cdf. 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/TCAGR2274899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b7cdf3b940c8eb3d8e4a422e9fea65ffba0730d550bfe68e9ce78a28f6a819. 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/TCAGR2232230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1284032d52781d11f8c2119b7fb326bc8aca3241d87fa9e33c3e313469c87dfb. 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/TCAGQ2254998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c646be3e09a962bcc8a7fa5a89d747e71702fe2dd4e381f471c5acb385b503a. 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/TCAGQ2240830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2f7bb2506bf7a57fe2b1d1412b513bb5f0c68282dc668a5607990c1d6c33c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGK2299860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57d1d4b20b07428696f35d4532c6ee6e6d7688a767bbf48931fc18bf7ce74c7. 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/TCAGG2229633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7c894a7ae56089c6e4b493eeca0fabf7017091a7c9670be2ae5dab8cf34fd. 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/TCAGD2221732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bd4088d423e28d5805b853206b8644e37dcb71f507b371e492c2da75c53bdc. 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/TCAGC2277115.