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 0x7837d799a35f646cdbfec7fb8ce766a9235e604837067d37b461375fced72f66. 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/2be48ff9-8399-4763-9c73-687cc762ab77.json and https://artists.proofprofile.net/proofs/artist/2be48ff9-8399-4763-9c73-687cc762ab77.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 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 0x35659f95a05d17548638da1eb4c33cb8c1dbe3207863849f76d1619051a3fe93. 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/USCHR1313770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1938072d6161659035ef2f711cf14458b6a71d257203d88bf23b85f3c26edc4a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USCHR1313866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc477fea59d66a317606f639a3fc406511974a2f7fb471ac31210124b903a9086. 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/USCHR1313771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea4d45dd99cc42a38ae691221798d4e0f103663b1e0301b219ac37836f5b4e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USCHR1313908.
De Cera y Escalofríos (A Morente de la Puebla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dacbffd09d46adfeaaa17e436c67780db678d7c1dfcf2390e4e02795f22ff4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USCHR1313847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e35bffcbc316dab1255f9c5a350b2e7e1f5729d24bbdaed6b4e8ddcad9f70b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCHR1313867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811c43787df543ad2b29960ff3a6eb547e45b4847993c31a5e0d563c6fa49b0e. 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/QM4TX1543633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2886bbbd13fe957543292b25adfbf856e591e1c79a2a3d31cee764dc566416. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/ESA031604202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f762d5e19b5d2060a2eeada336e502f4a40dac6f38261826ef59bb45d82b33f. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/ESA031604207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3950f3744784391b7e6e966f34746f8415816446cb9ad442a43d1a159fec3fe. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ESA031604210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c4c3987143c59395dedb245be4789f340a5bee32c8b6d8e1394e15661cff6a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA031604211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a01ee8cba0f572265293878cb6ee68696af7228d42726e90a74a06b43e927. 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/ES04D1800727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61845321318be9396935aa5213d7fe3540a910da90740edd37b498eb1b91dab. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ES04D1800730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fd6b9612d98681ba480d23fd36ecc45cec4be79625fb6c1453daa3d93ef7db. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:34:13Z), 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/ES04D2300031.
Quien Pudiera Olvidar Un Amor. Guitar José A. Rodríguez (Sevillana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7144abcebccdc855c24cf644066b075cf0ce0a1a709b26b79c97474f63839c2a. 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/ES6679900539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f443af7aa62e8ce122e0234e692f4d0821e6269e473695fe02d6ccfcfa21e4f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES04D2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743425509152ba6aed7c3df678d7e01c278a010cdc4fcd31924b64eac1d51618. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES04D2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b86ca4b86854d65672744ecee08e2ad0b6a59c2eb008fef52ab9ae4840aa83f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G1508774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f430339534f08564eb9fb02f6587e53cd36720fd0644bfa13510766304de8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES04D1600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d4424a6a1a3e0bbd8ecebb66a27db91f116621cbc4b701056eebfa30e5df6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES04D1600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05083b58843f7bfdc50a0c0e0aac3e6eb2becb497b17951411d58c1f00d0816d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES04D1600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc83a17a0618a4c12c090583b4ee75f17942013dc5ad9d034614660c4026e6fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES04D1600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9daf00f860f96a849eea99ea58be38607afc7d07323243167295e7ad9e585e6. 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/ES04D2300072.