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 0x578101a4bc39446a21fbc8c66442b4e9be32aefaa71c81712d2e1a2e96f1d3e0. 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/ab889926-1283-4ec5-8fcf-b13b0410c486.json and https://artists.proofprofile.net/proofs/artist/ab889926-1283-4ec5-8fcf-b13b0410c486.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Songs of Taizé - O Lord, Hear My Prayer & My Soul Is at Rest
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 0x34cf717ab596c568b80a4daa3859f174e571ce4472ce672b0c1bb7225ab0a3a1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBBTM9921001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb303ed305061bf034b67b30124370029d2885c9d5018ff45a3262795a5daa2. 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/GBBTM9921003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c843181bb311d2e91e0bdea3bff35d7faff8f4b30b920eeba2d148911fd18f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:12Z), 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/GBBTM9921004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ad2a71759e4f980d675c91b63622e93d2570e20a22407b21e96306ec5806bb. 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/GBBTM9921005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d8e9a34fcc4ecb32cd1370da50bb8de1a1d1cfb0a04221bdf0be97afb1eee3. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBBTM9921006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd20b1324ebad4024918583a8a96e4f00ee8aa6e69e92ecc516281c164ed8ac. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBBTM9921008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ff964510691605ce45a235f9c4180a24b7f846c1a98fc426f063c64f2da200. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBBTM9921010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb4f03f6dcd943c5eb4468761777d0229f2e8ccc571176f603da209bee87f5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBBTM9921013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16164d27e0ea56d0231ba5ae267fc53ee1175c238d9ef2fafdc49da0d72ca87. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBBTM9921017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba332f6d332a665f002b301ec9e58d0523fbcae0ca7b36d7ca03e836103383c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:03:38Z), 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/GBBTM9921019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b2f51593862ef66f6b8b5284058470195ae09ace5715c0fb4398496a597108. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:18:35Z), 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/GBBTM9921022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d488a3bdee491ba8c05f6a5939f0af4508521f6edecae12a109bf9a48a2c5. 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/GBBTM9921025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd20b1324ebad4024918583a8a96e4f00ee8aa6e69e92ecc516281c164ed8ac. 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/GBBTM9921008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bdb3daa9c8fec920982953cf829f443b450133ae624982acab3e1d40ed2a00. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:06:21Z), 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/GBBTM9921009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43edc1580b13deeb478ec0e3593abf1b4540f04eeffb85cbef345128230eb8e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBBTM9921012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e2dd2ddafb1bdffd2ee7779eef3a6f42ec348db837f85f9547ea06d4bf12f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:16Z), 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/GBBTM9921014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dce3b98a1047eba80d967d6cc270bf8870a84879c4f3e519fa50f86e982570. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBBTM9921015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f7884f882f20b7f64adf7adb71b71327c74aaacf99880b1a2b693a66d7fda8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBBTM9921016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940c1a9d716f1adcffc64085d0b716d008b1c3b5fac9e4d9a540100ead1933ec. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBBTM9921018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f746e35826c8acaadfadc0da63659e14e5589f445ee08ae3142324e161eba0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBBTM9921020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fce367728257acc3b06dffd18615b3d326f9096e90abcd92601c19682b2d3a5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBBTM9921021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee5cdea2310c289e8288cf76000bead87b671d4ffeb08a651c63c0d8c7d7ebb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:29:18Z), 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/GBBTM9921023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d488a3bdee491ba8c05f6a5939f0af4508521f6edecae12a109bf9a48a2c5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:02:39Z), 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/GBBTM9921025.