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 0x8a7186758a8ef2882c9924a92d4d893970f5b39de1403836302983489863497c. 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/9b82773a-441a-49dc-8cbb-7f53abe0cb70.json and https://artists.proofprofile.net/proofs/artist/9b82773a-441a-49dc-8cbb-7f53abe0cb70.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 0x1cc61bb34d1ec093b85af9201073b0bca6c2f728e19843297699db22882a4fb3. 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/ARA0B2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02023e04fc1e5908e9b2bb5463c39c39e037cda3aae8372a4548888e1a04e9a0. 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/ARA0B2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c57884a8fa9fff86a32d761da413f85bd858122a176690bc46532a63ebacb5. 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/ARA0B2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9463170a1b28bb29fad29f4a27c942c54e490c30c34fdca8bad81a5cf4c7034. 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/ARA0B2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1931ee893b6f185fecb7370cd96ae04ec072d219b977444f6bd4f30ca50590fc. 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/ARA0B2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17870324f0e2ecad3a2078fcac97a455d391f3b891b36fc1674837072d954cd. 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/ARA0B2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5069f3b36d1cedc828419d9f96b5f2c615de44fde471dab1ee352f90da4228b. 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/ARA0B2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e57d04e60d73a375ec9f6565a16a4f2340cd7e5a6537316ea8514315f832a2. 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/ARA0B2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce2c38b6581bfd61e39c1eef1f2f7b674a0c833fe4b977ddcfc54eb7e078e86. 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/ARA0B2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841e57d70674e76d6e380267b433e60b95456e8cebd22faafa42b38e2ef4e031. 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/ARA0B1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67a03c700ee84a492bcb319af6452d54eb9c96373db9e95177a3f9831729972. 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/ARA0B1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cb7c47d53da34c1eafd11b7c5dcba679d64f3ea2cf5abfdad0a5086571be8b. 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/ARA0B1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39873864b7e04f41fae14a57346644bfb71e166cb56baba251a864cb0e4b6e4. 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/ARA0B1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0ee117cc342f367822e1b78dddd65bc2caf5ae1a67595c326a0217a8c7fc4. 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/ARA0B1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe931bd628f3e2fc7329a6c8ae92c6db148b2264c9719c700f8384bbb3699a957. 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/ARA0B1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94320e7f892633d6cbc3d06acc74747d18c5f04e3f8e039b0b880359c33beaa3. 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/ARA0B1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d75382b9fc396101c46d0fc13511ec707df0b1f82a0fd86837602821c352d0. 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/ARA0B1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddee4778a971ecb809545fa0668d445c51ff5364e0a715a29e0be2782a0032b. 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/ARA0B1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fec0fbc688b95d61ab39b5686e0b428946a233b9a5c2940307c3def459a9e9f. 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/ARA0B1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d389d8094d96852fb148d9b1d53a688ef15eba09dded96e210e621da43c9c. 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/ARA0B1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24773cdcb35fe8849b70869414b26efce8ba22eb0eb75b898aaa1ceda689796b. 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/AR2642100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4730e326c0c659bfaf2b0bd105f002c848643800c72f5e0e0f7b6799bbc4e0f. 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/AR2642100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d04d537e7a50897be2c69dad8185a32d615912b6cfac44509dbef9bae07890. 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/ARA0B2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0220cf2c5f4db516a4c82db6b73e5f04ea5aba0ac1955b9ee373e576707ed7c0. 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/QZNJZ2193047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dca1c84ec42702894faf240729976cca9491a7a7a13ac40606033fa77b573e. 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/USCGH1998514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3dd4208fcfc1186ca95d3c50ea6b4447eae852ab918e3f26c5916a54f706f3. 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/USL4R1818760.