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 0xa6cb9149b322d0052cd969b069b0815d945eb2f9439b190d1a5cdc32cfba4329. 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/a2b9fd2b-1a12-462d-83d0-28a40ad87f15.json and https://artists.proofprofile.net/proofs/artist/a2b9fd2b-1a12-462d-83d0-28a40ad87f15.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 0xa91f75910e9648aece35d6e1a94c9858f6780abc4a619e8d5a002881d5c70ff7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CAF270801601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8b84689c5b8fb320a80be2f99b68d0f8809843c659acbdb7c0b1c02d586c1d. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CAF270801604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec48f7e4fc86d85c53d01fecc3904adfdae34a07b6fc68645ae07469df529b7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAF270801607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1984aba62e05f1a2c58f86296ec07231f9f9139bf6c0c8ee48b40f6840c537cd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:15Z), 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/US38Y0813203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed42d910371aa6077317a2940d04784da1981606cdad9061fecffce91ecf770. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/US38Y0813205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc31756c8aefb408af2f1c2cbefe9126913b1ef232144b790738450ac533216. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/US38Y0813208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb8d615def40100be81b4c563b6694d6f3ca2706e999566a36c74e3d4797fb4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US38Y0813209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11f78ab6006cf7d8d792dad2bfee5f879cce9f3d14f9f835c9f4c6b61314001. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US38Y0813210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0810a20ef4d9c3c2c577df36c671142e98f37a004c1dfd0129c6005c40f1cb9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CAF271002101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495d31c362d480d57ad6f9a0110ddd455226da815abe53dc1f0080b506e26f53. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAF271002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352779c653f74b6d123131bfd138fadcb80f61905677a6413d00ab0bd934cfd4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:55:34Z), 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/CAF271002103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cff1aebc9ffbeb75e326e07e994fe111ad5b113ddbcb30ee2a47f965cd2a8f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CAF271002106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad294611f50dc8eddc9c9562cdb1de7cfae3de7e4e275a42dd9ea6e92c153432. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:46:22Z), 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/CAF271002109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de111663ee661d23a6c1e20f0e9b3f510175c69bc62430bb62b1a4bc6dbd417. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CAF271002111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c240bfb8e7dc0f2123782319917806e4d745a5a50a8083823b453d29edcce02. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/US38Y2037201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55998b29d8f13418970a28c48f95139fd8b53a84f732b81fdcf51edd13204c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:18:58Z), 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/US38Y2037202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc5de37694634c0bd92debfca552486c96c13ebdddd5dc9c3c94382ea97759a. 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/US38Y2037203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d92d140f5e73815bcc29beabf59088eed1a0d705f18a74943ff4339e70bfb8. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/US38Y2037204.
Group Transport Hall (Alternate Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c62c058329b25f89ea67b88f7008f3a1c6900cad576bd5474118892625ccd1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US38Y2037205.