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 0x25f6311be93c74a2fc2ccf938a4677050da4238a8f434d2b92c810a22af9f479. 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/e010b7dd-8943-47ad-9aec-d2a670c8884e.json and https://artists.proofprofile.net/proofs/artist/e010b7dd-8943-47ad-9aec-d2a670c8884e.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 0x45e8b57a4b53abf09f490e1d6bf7809e00693d1d78806d9e14aa2615994f582d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB72527111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae074de86c85646f4f19f7f07f80b5522b0a12191f69a7a9c337cd574e5e423f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB72582758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f98cec8c9b74be049c11af1c922f4bde4082ccdc29747cd7ccbeffea4c62522. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB82513230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86cc511a3dd3fe2cd35dc39bc36d8eb3cdf5c7aaf2359afe6b0897c6bf85d73. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB82561723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95e873e774cc3ae43a8db1383c1bd60ace5855bddf72b8ad979097401f24fd0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBE2551083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fd501548e4555ba23b9d918771ee2cccb4d25f1d202e9e992e7067bce76609. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBE2553319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b983f7eeef099262ccf65e82f22e1c46b712094eef4548c2ed94d5f3ba123b. 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/QZWFJ2515433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb730588a2e8d80c4dbeb8bb446ec9193bc89ba25bf9fe26bc16773ac2e86e2c8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFJ2594631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42826ad72b6cea51a70b5d49b44f7d51b790dbb9c89179ce51728c256587af9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFJ2592502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5420d948359143bc03e6d4bea08b6d376d2a7ecb20b67abb31c467a1c33170. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFK2535185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643269661c7c1753aa91fde1d3229929a6b7abae695e536bb22f2e013a1b0f9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFS2581094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675c4bbbf9f6a2613bae2e574a4fb13c53954e6bcf6c40b82832ca0028a31f96. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFS2583188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a475e59bbcea7516bdc801077ed48440abf32b1ae190b2689ddbcbff78ab82. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7W2508718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec1a5f183186429f20c7de620f60b7c9aeca2c15f28a443d94f66fbf6952b87. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7X2583903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5d6e76d22ef9b4afa3688564314fcf3a44b1b34e01fdc7aba57411a2194cd. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ7X2581974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4091664abebcc3435f8e66b900b9813257807eef277df68bb875786bd1eb066a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EX2522492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df334709e00b89e78cdb363780c8fe2a28cedf4d871b8a1dbd11aa3c59c01e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3EZ2531506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ded5afe8bea4cd19c713c1f393bf7f0550a385bc8a9672ef9cb586447c81a13. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22544999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1387e2cbc9f802c1b42fe5942cb18bf2f762f2133e2c8ec4228a634d601b005. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22547700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0070b20e162145963e897ccc903b5a9a4e90180e4888b92eed3e566a359be4. 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/QT3F42503449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdeb21866a8f8b31c20c0c23a9817063603eba9ac61d9dd23ee4725a3ee289e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F32599675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dcd87ffdd2bbdab4f9e6c1bbf95c8701a60b4f21cde8a2cc459c870ff1d2a2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F42539576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f32b0f4a784548e85975b3501ece8fdb40295686230b3f1887e8421fdb6e2e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F52574834.