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 0x6d49cb2e5bb7ab48f89b137cdceec3226925a1482b1bd3a8c825efaf8a7dc0b3. 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/941d1fa8-1b31-40bb-9afe-b63cac0602aa.json and https://artists.proofprofile.net/proofs/artist/941d1fa8-1b31-40bb-9afe-b63cac0602aa.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 0x2c171c894b6040180ea975f03a02c5c6705c2bd80267f2b763973b51a844dc7d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACQ1662341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b98de5caae6fd87938a46feef8da64fd586dbad004c125e67ad3516bc9ff67. 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/TCACQ1662421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c0d747667e6c221db73bc41ba0001fbe1ab1b23cc04f5dd33579248374271. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCACQ1662422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9591f5b7dcd8ae34c367e351dc636bd846f7bbf77e25a2358f5b6798b6e67b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCADX1831781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77368d18cfac67aa3ab7422cc209be87b55112531ea99b91464fed9fc69658d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAEM1943178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ec2ffdd54ac34c5e3ed17d97e03e30a0fe7adfba3bc9158d53877520d7e81. 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/TCAEM1943202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3401d40c748bfe9a9a1486f568a9e0f8295c6437a64055b221599deed6519f6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEG932101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5690abba7c531432d459b881be3a883caebe3508bd9ed23224553471842aa6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEG932101052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829edc6b15e63ac3405d64223898691b0a42d755dcda0ef3ea353d4f8704fb1f. 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/DEG932101053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101e5b6ece8d8ac05b472909eb40fb457b41f9144ed2b4ddf847cac3363fcf9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEG932101054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ff7a8e6e667697f58390954014934683fe803487e56d8276b4a0e4894393e. 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/DEG932101051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3401d40c748bfe9a9a1486f568a9e0f8295c6437a64055b221599deed6519f6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEG932101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964088b8b3369fb5dc81f5e859cfb65c55d71f59cd17e3d312c27cd46ad4a28f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:00Z), 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/TCAHD2389402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78b25018f135430da55ecaa604013193b120635796717dda76e3e0745130ca9. 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/TCAHD2390917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce82ae96ba8ab10c12cd81863b866457153b0033000821b58ec2d3e5e4a5e51. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:46Z), 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/TCAHE2389929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfebf9d091b651f1a8a8cff50385d882b18c3de0ab913dd16182eb50630ea717. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEG932404232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c66487b975c3a31fc8727eb696dd20d1c470dbb0e7023913416ebd72e8da0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAIQ2473325.