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 0x4dd802dbcb13d70dfcf213fcb4a3e92b1e25c58683b44e0ef6936690cea681d5. 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/285850af-59f5-46c5-9c38-e5d935c4a935.json and https://artists.proofprofile.net/proofs/artist/285850af-59f5-46c5-9c38-e5d935c4a935.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 0x9e2b022a9b613f45a0ba95fc474616940ba37019c4a1c69e68d6a71220769287. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/BRB580700152.
You Are the Sunshine of My Life - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce5e46a905adc208b6d495e7766e4bb05d24cea35518ebc119391f1cd8ae43. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRB580700156.
Dream a Little Dream of Me - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7acc2719b19f90f396548cdc7b7a859744dac543ab127f45c6510558e4dfe. 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/BRB580700160.
They Long to Be (Close to You) - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac3d059cdad86ea446128cbff95efc60347a7aab43bb2da757a12573c70540. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRB580700161.
Can't Take My Eyes off of You - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bc863c0d478fc4af162603ee4287ebc5caaaab46e5a8a66779c48e273a4d9b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRB580700165.
Baubles, Bangles and Beads - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb22b0e3a090b457388a5acff28a9217d974a2df286a07d2fd9ecc4fbf0d039. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BRABZ0300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb182adb087cb09501c80bb3fbf8b42145e1ef180b46162bea7d1b07347703e47. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRABZ0300156.
Autumn Leaves (Les Feuilles Mortes) - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2f0e0e0cad9d65bd09022328667fdd132eaacee0e41fc5bbaeb87efbfddea5. 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/BRABZ0300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3edecb2bcfd0ab4928db26edc73f85484215efcb29c6a7f1a770670fff9c53d. 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/BRABZ9900001.
I'm in the Mood for Love - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9c901ffcf5c283e5572c345bc91da25eb1b0150809294c5443ae6dd2ff38a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRABZ9900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf9877c4d9c42c4930870adc174b08f983e670888d99719fca598d7ad5d4ead. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/BRABZ9900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89607393eab620c3273fcfb1336fa24432869e29cda6c1a6221eff9aa1d05a4d. 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/BRABZ9900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cd1ed706e54257942c47790f5dad1290c694bc5b707dbd719d137af6f939fa. 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/BRABZ9900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f4442bb6f48c6bfdd093b9060daf1eea3f07df08d69fb3675f47593b2f411f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BRABZ9900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73b22c551e202a738d0a914e16f4e3c998d0c6b2fa6cd59b39599f53e66418. 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/BRABZ0100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109805c6062d13208e136ddae1840d8d683d1f62f150acfc83dd9140deab1f81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRABZ0100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100a08619dfe0fddf9b79d3d820b0400dc353880c73255df58818add908c2b46. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRABZ0100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1351a70a705818fcdd5bae0667e911ab76c0225e16de9f230110a27b6d732d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRABZ0300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb611f6bd1c7bdc6d7a711a7b8063a3a6aa61dd3b611dc8c6bf897bf4fd4882ba. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BRABZ0300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894f5ef439710b42731b71fbb9fd2e0f6a53bb9dbdd0ef629c350ecce7d23cc0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRABZ0300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753433a4b4010df8e6b726cd7dc63acb8eaa4489aca731b985ccbffddd81d4ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRABZ0300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3edecb2bcfd0ab4928db26edc73f85484215efcb29c6a7f1a770670fff9c53d. 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/BRABZ9900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9c901ffcf5c283e5572c345bc91da25eb1b0150809294c5443ae6dd2ff38a. 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/BRABZ9900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89607393eab620c3273fcfb1336fa24432869e29cda6c1a6221eff9aa1d05a4d. 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/BRABZ9900007.
Cool Covers in Bossa Nova: Taste of Saudade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae2894d7e0a3c468c564878690612e8862a7bbbf20eb7cedefa6a424975ae6. 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/FR6V81995073.
Cafe Bossa Brazil Vol. 3: Bossa Nova Lounge Compilation
Cafe Bossa Brazil Vol. 4: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894f5ef439710b42731b71fbb9fd2e0f6a53bb9dbdd0ef629c350ecce7d23cc0. 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/BRABZ0300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2f0e0e0cad9d65bd09022328667fdd132eaacee0e41fc5bbaeb87efbfddea5. 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/BRABZ0300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987b39b754c62a42fdda99de815be4f0bf603227a692bbb089f3d6f240a8dac8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BRABZ9900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae2894d7e0a3c468c564878690612e8862a7bbbf20eb7cedefa6a424975ae6. 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/FR6V81995073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce5e46a905adc208b6d495e7766e4bb05d24cea35518ebc119391f1cd8ae43. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BRB580700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100a08619dfe0fddf9b79d3d820b0400dc353880c73255df58818add908c2b46. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRABZ0100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7dcb59cc2aa08864f8ae98949d0a8f193e537441a60ca852ce2e5bd609f3dd. 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/USA371655844.
I Left My Heart in San Francisco - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc8df7eecf9d03de848ae5cccbdb0b9516a33e28daa1569c6a2fb99646f3bee. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BRABZ0100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ab5a24d9a041cade6a80087dadfe73623aa339fc31c49da6cda4a7cebf4b7. 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/BRABZ0100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34149480237714ff5621bebb818173ffe66ef32bf751529deb9f3eeb31998224. 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/BRABZ9900009.
Cafe Bossa Brazil Vol. 2: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753433a4b4010df8e6b726cd7dc63acb8eaa4489aca731b985ccbffddd81d4ed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRABZ0300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7acc2719b19f90f396548cdc7b7a859744dac543ab127f45c6510558e4dfe. 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/BRB580700160.