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 0x4f29a398b817a3c91f34fbec1b9587cdb6a386bb127ac830f85ed1425a9b6dad. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5dd860ba-c204-4817-8209-0da08d89dadf.json and https://artists.proofprofile.net/proofs/artist/5dd860ba-c204-4817-8209-0da08d89dadf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Collect All & Save, We're Leaving Dark Times.
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 0xd3f8302d520cd03e8ac41abb22cdd5cc9200ea37ee349ae55c85cf51e0c3bc38. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCAGF2239437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33f06c47096595a8d87b53c003bc2d3193f7b89567a5601b7f6a418efa3a22a. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/TCAGF2239447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0118cc22a5cddc10a8ead79c16694601ccacd0c34e74b6a012b028270f8d2db. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAGF2239461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3514fe704a2e42700f835f34fa8569541bb20be327dc73ea7b7d723f5d3ac563. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAGF2239498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f33631cc92b2020b05bc213c2030762d9651804ed16ff979e36ee0d25c258f1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBHLW1802650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5a02d97b18078450b22a5bd75f2eac08a18847a158714f0099ccee9daf8348. 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/GBHLW1802651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c04e46ce0e84c6f0aeaabb471084905204ed2bbbeaaa01770b33dfa9250d58d. 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/GBHLW1802652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a61b9ac011ddad118a4839e76160fa2c264c4ba2630132b48277a3ade1f6dbf. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBHLW1802653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f05f25e811f88fc3991f3d7dfa4ab7adb7216f9b15adc6b209d2e43eea3c8c4. 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/GBHLW1802654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7276ca68319f8c86701535eceb9ab8e16892e8f4a010539c52c70803fccb4c. 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/GBHLW1802655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4579a3a588dacba018f435df7ac8b12ba4c06214263fd6f05bc50649ffae2ed. 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/GBHLW1802656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d380bd515c2a476da0ebd9f728b8f8f273721ff60252388aa8645e799f3866. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBHLW1802657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe7eafd18364669b7e0b43cc8af6ea93c9a5358156c3bad83a1d067151c1ce. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBLFP1846259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354fa8a116db7dfabf9f2bd5f7e15dd975f96ee13ce7553f6f1b195b68b7cfc7. 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/GBLFP1846262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bfb21e327ca44ce587460ddbde3f76766c11537ae6ff2a5f4d6a033dafafac. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLFP1846264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512557ac598bd30bd9dd2493929299c300ebd0b133063a1fc5d34804ee2b7fe. 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/GBLFP1846266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb47d897c3583afd8c8b31b840d96519daebc99440c911d22b5150366364d79b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBLFP1846269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3344a5787596f4080531a22783dcd97b56a01f3be6f0742eae322707ae59832a. 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/TCAHD2378879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0edfa24d9f7221908454c3b27f2df8036f996b856a5a110dc23a95c5a8206b5. 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/TCAHD2378886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7353696ac91cc006bfaae81ac5af03f97efe1e20ed33ef14818b8bcbf77a04b. 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/UKCTU2205201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee8ff70f1ca22e66c1fc8d3f188ebaa67488d3438997d1ce381953ace198fc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKCTU2205202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22bdf057f85493e09f1c6832f5a578db2345f119bb2e7798f4a96ca83dd557. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAFZ2239324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7befa94d476c9c089a215018ae0e32c86047857f1b709205ee7a8323a64550. 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/USDY42366024.