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 0x3362648bffa352f904561996b57843678d5e1a2417af51dc240c4f23adcdc5a9. 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/5aea0d90-4192-4bc4-94c0-e2fb439e5314.json and https://artists.proofprofile.net/proofs/artist/5aea0d90-4192-4bc4-94c0-e2fb439e5314.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 0x28208f84079cde530053296dbad18b27ccf3bfec24ac94a736c9ce5a4664bd3d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:07:29Z), 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/QZDA42125490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22584dabd16925dfd949ccd17af4850b2ed1b48c68bb522d98cd59c444069d48. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN52228464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9cb592a3ab61f40237315d58b997f4fa6f9f82dc2707b00177ca84ffe4863. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN82327982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a9a88b7275e7315ca188b24fc14173683fc7403956834ddb4b10d4dfed33e1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBE2323938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0ef341f27806c8735ca2d3396b80996511ade203ae8105fcd9716043cb2e93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA52412250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0ef341f27806c8735ca2d3396b80996511ade203ae8105fcd9716043cb2e93. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZDA52412250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7721e5d0f81a700355ff4cf5c9958db91089ed8d7adad06a9e108e80066d57. 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/QZES52455717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32f746490251dbefca3f99bc9a1e5750257e6b931d198c1aeb0b577595a726. 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/QZFYY2444181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0502e244a45defa3bfe300c6631a5903b0fdc6acba1a779284de74a3ca6ef19f. 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/QZDA42408719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804f1787cdeb10a50d24fac052281a7e2cde80a3a0692cc2e9377feb6b4c27b. 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/QZES52455718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694dad0d303eb1c7ed79dc69f27911372d21c601e50791a73bae46659a6ed44e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZFZ62428309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8003716614669aef4445362a1d9f8468fab7e63fc32569035ea1a3da3eb30. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFYZ2527504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe728125d289b19dab9428f4a6ec0e8f282aa1957717570592699e971cc932221. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFYZ2527506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63ef56a515ca7b52acd3aaab4e4906acfeebfa85687828fda385c09e5b1ebb4. 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/QZFYZ2527514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03405733cc961ba1e566f0c31b98047cce162d75b85939aa1327a73e8e79610e. 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/QZWDD2265540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed351400175ae26feff341457f4ac61af0380ac380bf6b6aba8bc4e8437face4. 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/NLRD52263812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a9aad3e80d6d67cb9ba4a9b408b068f95848404de526c5f16205b0d053e12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLRD52263813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c4fda7fc6eab1071e68301bbc9b766745c5e2eaac3f5d8186c4c0dddbad77. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NLRD52263814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eb53a8e036890dd14c484e612c5eda6da0d7c1aa127c8cf9ffdd856befcb68. 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/NLRD52263816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a2068c9e99085fd022022c7a166d50f3ea9bd1b3b7748ec51cdedac6db42b6. 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/NLRD52263817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baeb9193be4f424c71b9f4492fceae7fe8d29e32f49781251d44bce29d160b6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLRD52263810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d35d04161d9c138e2029bce5929970109dfb2b6f67feb880b0aec79ba9b2762. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLRD52263811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa313d0bc92abd75ebc903926d007ddfe839131ab57af493c2794613afa86ff. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLRD52263818.